diff --git a/CHANGELOG.md b/CHANGELOG.md
index 300e1fac5..b6482770e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## Dev
+
+### Breaking change
+* The Python API now requires Python 3.9, up from Python 3.6.
+
 ## v0.21.0
 
 ### Breaking change
@@ -619,7 +624,7 @@ would pass `OMP_NUM_THREADS=4` to the executed `<program>`.
   is `hq submit`, which is now a shortcut for `hq job submit`. Here is a table of changed commands:
 
   | **Previous command** | **New command**    |
-                |----------------------|--------------------|
+                      |----------------------|--------------------|
   | `hq jobs`            | `hq job list`    |
   | `hq job`             | `hq job info`    |
   | `hq resubmit`        | `hq job resubmit` |
@@ -735,7 +740,7 @@ would pass `OMP_NUM_THREADS=4` to the executed `<program>`.
 
 * Generic resource management has been added. You can find out more in
   the [documentation](https://it4innovations.github.io/hyperqueue/stable/jobs/gresources/).
-  * HyperQueue can now automatically detect how many Nvidia GPUs are present on a worker node.
+    * HyperQueue can now automatically detect how many Nvidia GPUs are present on a worker node.
 * You can now submit a task array where each task will receive one element of a JSON array using
   `hq submit --from-json`. You can find out more in
   the [documentation](https://it4innovations.github.io/hyperqueue/stable/jobs/arrays/#json-array).
@@ -743,10 +748,10 @@ would pass `OMP_NUM_THREADS=4` to the executed `<program>`.
 ### Changes
 
 * There have been a few slight CLI changes:
-  * `hq worker list` no longer has `--offline` and `--online` flags. It will now display only running
-    workers by default. If you want to show also offline workers, use the `--all` flag.
-  * `hq alloc add` no longer has a required `--queue/--partition` option. The PBS queue/Slurm partition
-    should now be passed as a trailing argument after `--`: `hq alloc add pbs -- -qqprod`.
+    * `hq worker list` no longer has `--offline` and `--online` flags. It will now display only running
+      workers by default. If you want to show also offline workers, use the `--all` flag.
+    * `hq alloc add` no longer has a required `--queue/--partition` option. The PBS queue/Slurm partition
+      should now be passed as a trailing argument after `--`: `hq alloc add pbs -- -qqprod`.
 * Server subdirectories generated for each run of the HyperQueue server are now named with a numeric ID instead of
   a date.
 * The documentation has been [rewritten](https://it4innovations.github.io/hyperqueue).
diff --git a/Cargo.lock b/Cargo.lock
index 1bcc98674..9a8bc620e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -196,9 +196,9 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.16.0"
+version = "3.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
+checksum = "1628fb46dfa0b37568d12e5edd512553eccf6a22a78e8bde00bb4aed84d5bdbf"
 
 [[package]]
 name = "byteorder"
@@ -235,9 +235,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.2.10"
+version = "1.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13208fcbb66eaeffe09b99fffbe1af420f00a7b35aa99ad683dfc1aa76145229"
+checksum = "e4730490333d58093109dc02c23174c3f4d490998c3fed3cc8e82d57afedb9cf"
 dependencies = [
  "shlex",
 ]
@@ -314,9 +314,9 @@ dependencies = [
 
 [[package]]
 name = "clap_complete"
-version = "4.5.42"
+version = "4.5.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33a7e468e750fa4b6be660e8b5651ad47372e8fb114030b594c2d75d48c5ffd0"
+checksum = "375f9d8255adeeedd51053574fd8d4ba875ea5fa558e86617b07f09f1680c8b6"
 dependencies = [
  "clap 4.5.27",
 ]
@@ -330,7 +330,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -507,7 +507,7 @@ dependencies = [
  "crossterm_winapi",
  "futures-core",
  "mio",
- "parking_lot 0.12.3",
+ "parking_lot",
  "rustix",
  "signal-hook",
  "signal-hook-mio",
@@ -550,16 +550,6 @@ version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b916ba8ce9e4182696896f015e8a5ae6081b305f74690baa8465e35f5a142ea4"
 
-[[package]]
-name = "ctor"
-version = "0.1.26"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d2301688392eb071b0bf1a37be05c469d3cc4dbbd95df672fe28ab021e6a096"
-dependencies = [
- "quote",
- "syn 1.0.109",
-]
-
 [[package]]
 name = "darling"
 version = "0.14.4"
@@ -605,7 +595,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim 0.11.1",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -627,7 +617,7 @@ checksum = "d336a2a514f6ccccaa3e09b02d41d35330c07ddf03a62165fcec10bb561c7806"
 dependencies = [
  "darling_core 0.20.10",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -689,7 +679,7 @@ checksum = "5f33878137e4dafd7fa914ad4e259e18a4e8e532b9617a2d0150262bf53abfce"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -709,7 +699,7 @@ checksum = "cb7330aeadfbe296029522e6c40f315320aba36fc43a5b3632f3795348f3bd22"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -885,7 +875,7 @@ checksum = "162ee34ebcb7c64a8abebc059ce0fee27c2262618d7b60ed8faf72fef13c3650"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -945,18 +935,19 @@ checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if",
  "libc",
- "wasi",
+ "wasi 0.11.0+wasi-snapshot-preview1",
 ]
 
 [[package]]
-name = "ghost"
-version = "0.1.18"
+name = "getrandom"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39b697dbd8bfcc35d0ee91698aaa379af096368ba8837d279cc097b276edda45"
+checksum = "43a49c392881ce6d5c3b8cb70f98717b7c07aabbdff06687b9030dbfbe2725f8"
 dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.96",
+ "cfg-if",
+ "libc",
+ "wasi 0.13.3+wasi-0.2.2",
+ "windows-targets",
 ]
 
 [[package]]
@@ -1138,13 +1129,9 @@ dependencies = [
 
 [[package]]
 name = "indoc"
-version = "0.3.6"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "47741a8bc60fb26eb8d6e0238bbb26d8575ff623fdc97b1a2c00c050b9684ed8"
-dependencies = [
- "indoc-impl",
- "proc-macro-hack",
-]
+checksum = "bfa799dd5ed20a7e349f3b4639aa80d74549c81716d9ec4f994c9b5815598306"
 
 [[package]]
 name = "indoc"
@@ -1152,28 +1139,16 @@ version = "2.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b248f5224d1d606005e02c97f5aa4e88eeb230488bcc03bc9ca4d7991399f2b5"
 
-[[package]]
-name = "indoc-impl"
-version = "0.3.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce046d161f000fffde5f432a0d034d0341dc152643b2598ed5bfce44c4f3a8f0"
-dependencies = [
- "proc-macro-hack",
- "proc-macro2",
- "quote",
- "syn 1.0.109",
- "unindent",
-]
-
 [[package]]
 name = "insta"
-version = "1.42.0"
+version = "1.42.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6513e4067e16e69ed1db5ab56048ed65db32d10ba5fc1217f5393f8f17d8b5a5"
+checksum = "71c1b125e30d93896b365e156c33dadfffab45ee8400afcbba4752f59de08a86"
 dependencies = [
  "console",
  "linked-hash-map",
  "once_cell",
+ "pin-project",
  "similar",
 ]
 
@@ -1187,38 +1162,7 @@ dependencies = [
  "indoc 2.0.5",
  "proc-macro2",
  "quote",
- "syn 2.0.96",
-]
-
-[[package]]
-name = "instant"
-version = "0.1.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e0242819d153cba4b4b05a5a8f2a7e9bbf97b6055b2a002b395c96b5ff3c0222"
-dependencies = [
- "cfg-if",
-]
-
-[[package]]
-name = "inventory"
-version = "0.1.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0eb5160c60ba1e809707918ee329adb99d222888155835c6feedba19f6c3fd4"
-dependencies = [
- "ctor",
- "ghost",
- "inventory-impl",
-]
-
-[[package]]
-name = "inventory-impl"
-version = "0.1.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e41b53715c6f0c4be49510bb82dee2c1e51c8586d885abe65396e82ed518548"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 1.0.109",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -1370,6 +1314,15 @@ version = "2.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
+[[package]]
+name = "memoffset"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d61c719bcfbcf5d62b3a09efa6088de8c54bc0bfcd3ea7ae39fcc186108b8de1"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
@@ -1393,7 +1346,7 @@ checksum = "2886843bf800fba2e3377cff24abf6379b4c4d5c6681eaf9ea5b0d15090450bd"
 dependencies = [
  "libc",
  "log",
- "wasi",
+ "wasi 0.11.0+wasi-snapshot-preview1",
  "windows-sys 0.52.0",
 ]
 
@@ -1501,13 +1454,13 @@ checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
 
 [[package]]
 name = "orion"
-version = "0.17.7"
+version = "0.17.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97ab5415cf60cd271259e576f2ddee7a5f9fed42659035224c01af766943fad3"
+checksum = "dd806049e71da4c4a7880466b37afdc5a4c5b35a398b0d4fd9ff5d278d3b4db9"
 dependencies = [
  "ct-codecs",
  "fiat-crypto",
- "getrandom",
+ "getrandom 0.3.1",
  "subtle",
  "zeroize",
 ]
@@ -1518,17 +1471,6 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
 
-[[package]]
-name = "parking_lot"
-version = "0.11.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7d17b78036a60663b797adeaee46f5c9dfebb86948d1255007a1d6be0271ff99"
-dependencies = [
- "instant",
- "lock_api",
- "parking_lot_core 0.8.6",
-]
-
 [[package]]
 name = "parking_lot"
 version = "0.12.3"
@@ -1536,21 +1478,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1bf18183cf54e8d6059647fc3063646a1801cf30896933ec2311622cc4b9a27"
 dependencies = [
  "lock_api",
- "parking_lot_core 0.9.10",
-]
-
-[[package]]
-name = "parking_lot_core"
-version = "0.8.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60a2cfe6f0ad2bfc16aefa463b497d5c7a5ecd44a23efa72aa342d90177356dc"
-dependencies = [
- "cfg-if",
- "instant",
- "libc",
- "redox_syscall 0.2.16",
- "smallvec",
- "winapi",
+ "parking_lot_core",
 ]
 
 [[package]]
@@ -1561,34 +1489,35 @@ checksum = "1e401f977ab385c9e4e3ab30627d6f26d00e2c73eef317493c4ec6d468726cf8"
 dependencies = [
  "cfg-if",
  "libc",
- "redox_syscall 0.5.8",
+ "redox_syscall",
  "smallvec",
  "windows-targets",
 ]
 
 [[package]]
 name = "paste"
-version = "0.1.18"
+version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45ca20c77d80be666aef2b45486da86238fabe33e38306bd3118fe4af33fa880"
-dependencies = [
- "paste-impl",
- "proc-macro-hack",
-]
+checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
 
 [[package]]
-name = "paste"
-version = "1.0.15"
+name = "pin-project"
+version = "1.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
+checksum = "1e2ec53ad785f4d35dac0adea7f7dc6f1bb277ad84a680c7afefeae05d1f5916"
+dependencies = [
+ "pin-project-internal",
+]
 
 [[package]]
-name = "paste-impl"
-version = "0.1.18"
+name = "pin-project-internal"
+version = "1.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d95a7db200b97ef370c8e6de0088252f7e0dfff7d047a28528e47456c0fc98b6"
+checksum = "d56a66c0c55993aa927429d0f8a0abfd74f084e4d9c192cffed01e418d83eefb"
 dependencies = [
- "proc-macro-hack",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -1648,21 +1577,15 @@ dependencies = [
 
 [[package]]
 name = "priority-queue"
-version = "2.1.1"
+version = "2.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "714c75db297bc88a63783ffc6ab9f830698a6705aa0201416931759ef4c8183d"
+checksum = "090ded312ed32a928fb49cb91ab4db6523ae3767225e61fbf6ceaaec3664ed26"
 dependencies = [
  "autocfg",
  "equivalent",
  "indexmap",
 ]
 
-[[package]]
-name = "proc-macro-hack"
-version = "0.5.20+deprecated"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc375e1527247fe1a97d8b7156678dfe7c1af2fc075c9a4db3690ecd2a148068"
-
 [[package]]
 name = "proc-macro2"
 version = "1.0.93"
@@ -1720,17 +1643,18 @@ dependencies = [
 
 [[package]]
 name = "pyo3"
-version = "0.15.2"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d41d50a7271e08c7c8a54cd24af5d62f73ee3a6f6a314215281ebdec421d5752"
+checksum = "e3b1ac5b3731ba34fdaa9785f8d74d17448cd18f30cf19e0c7e7b1fdb5272109"
 dependencies = [
  "anyhow",
  "cfg-if",
- "indoc 0.3.6",
+ "indoc 1.0.9",
  "libc",
- "parking_lot 0.11.2",
- "paste 0.1.18",
+ "memoffset",
+ "parking_lot",
  "pyo3-build-config",
+ "pyo3-ffi",
  "pyo3-macros",
  "serde",
  "unindent",
@@ -1738,12 +1662,11 @@ dependencies = [
 
 [[package]]
 name = "pyo3-asyncio"
-version = "0.15.0"
+version = "0.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0897c7e36110a32b726b975359b2bbe90c37fcf1266046d3b1c08c616a47a886"
+checksum = "d3564762e37035cfc486228e10b0528460fa026d681b5763873c693aa0d5c260"
 dependencies = [
  "futures",
- "inventory",
  "once_cell",
  "pin-project-lite",
  "pyo3",
@@ -1753,9 +1676,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-asyncio-macros"
-version = "0.15.0"
+version = "0.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4daada7260db6d6dbc1f9b50f3e3d21f9eb28c034722c9a61ac05ff56ffd62db"
+checksum = "be72d4cd43a27530306bd0d20d3932182fbdd072c6b98d3638bc37efb9d559dd"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1764,19 +1687,31 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.15.2"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "779239fc40b8e18bc8416d3a37d280ca9b9fb04bda54b98037bb6748595c2410"
+checksum = "9cb946f5ac61bb61a5014924910d936ebd2b23b705f7a4a3c40b05c720b079a3"
 dependencies = [
  "once_cell",
+ "target-lexicon",
+]
+
+[[package]]
+name = "pyo3-ffi"
+version = "0.18.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd4d7c5337821916ea2a1d21d1092e8443cf34879e53a0ac653fbb98f44ff65c"
+dependencies = [
+ "libc",
+ "pyo3-build-config",
 ]
 
 [[package]]
 name = "pyo3-macros"
-version = "0.15.2"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "00b247e8c664be87998d8628e86f282c25066165f1f8dda66100c48202fdb93a"
+checksum = "a9d39c55dab3fc5a4b25bbd1ac10a2da452c4aca13bb450f22818a002e29648d"
 dependencies = [
+ "proc-macro2",
  "pyo3-macros-backend",
  "quote",
  "syn 1.0.109",
@@ -1784,21 +1719,20 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.15.2"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a8c2812c412e00e641d99eeb79dd478317d981d938aa60325dfa7157b607095"
+checksum = "97daff08a4c48320587b5224cc98d609e3c27b6d437315bd40b605c98eeb5918"
 dependencies = [
  "proc-macro2",
- "pyo3-build-config",
  "quote",
  "syn 1.0.109",
 ]
 
 [[package]]
 name = "pythonize"
-version = "0.15.0"
+version = "0.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "445529621b8801c031b9e43f12f543fdf64379584646f132d6dcf2731c814e03"
+checksum = "9a0e1bbcd2a3856284bf4f4ef09ccb1157e9467847792754556f153ea3fe6b42"
 dependencies = [
  "pyo3",
  "serde",
@@ -1840,7 +1774,7 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.15",
 ]
 
 [[package]]
@@ -1857,7 +1791,7 @@ dependencies = [
  "instability",
  "itertools 0.13.0",
  "lru",
- "paste 1.0.15",
+ "paste",
  "strum",
  "unicode-segmentation",
  "unicode-truncate",
@@ -1884,15 +1818,6 @@ dependencies = [
  "crossbeam-utils",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.2.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
-dependencies = [
- "bitflags 1.3.2",
-]
-
 [[package]]
 name = "redox_syscall"
 version = "0.5.8"
@@ -1908,7 +1833,7 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd6f9d3d47bdd2ad6945c5015a226ec6155d0bcdfd8f7cd29f86b71f8de99d2b"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.15",
  "libredox",
  "thiserror 2.0.11",
 ]
@@ -1950,7 +1875,7 @@ checksum = "228ed7c16fa39782c3b3468e974aec2795e9089153cd08ee2e9aefb3613334c4"
 dependencies = [
  "byteorder",
  "num-traits",
- "paste 1.0.15",
+ "paste",
 ]
 
 [[package]]
@@ -1992,9 +1917,9 @@ checksum = "f7c45b9784283f1b2e7fb61b42047c2fd678ef0960d4f6f1eba131594cc369d4"
 
 [[package]]
 name = "ryu"
-version = "1.0.18"
+version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+checksum = "6ea1a2d0a644769cc99faa24c3ad26b379b786fe7c36fd3c546254801650e6dd"
 
 [[package]]
 name = "same-file"
@@ -2056,14 +1981,14 @@ checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.137"
+version = "1.0.138"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "930cfb6e6abf99298aaad7d29abbef7a9999a9a8806a40088f55f0dcec03146b"
+checksum = "d434192e7da787e94a6ea7e9670b26a036d0ca41e0b7efb2676dd32bae872949"
 dependencies = [
  "itoa",
  "memchr",
@@ -2215,7 +2140,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustversion",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -2237,9 +2162,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.96"
+version = "2.0.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
+checksum = "36147f1a48ae0ec2b5b3bc5b537d267457555a10dc06f3dbc8cb11ba3006d3b1"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2284,15 +2209,21 @@ dependencies = [
  "tracing-subscriber",
 ]
 
+[[package]]
+name = "target-lexicon"
+version = "0.12.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61c41af27dd6d1e27b1b16b489db798443478cef1f06a660c96db617ba5de3b1"
+
 [[package]]
 name = "tempfile"
-version = "3.15.0"
+version = "3.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a8a559c81686f576e8cd0290cd2a24a2a9ad80c98b3478856500fcbd7acd704"
+checksum = "38c246215d7d24f48ae091a2902398798e05d978b24315d6efbc00ede9a8bb91"
 dependencies = [
  "cfg-if",
  "fastrand",
- "getrandom",
+ "getrandom 0.3.1",
  "once_cell",
  "rustix",
  "windows-sys 0.59.0",
@@ -2362,7 +2293,7 @@ checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -2373,7 +2304,7 @@ checksum = "26afc1baea8a989337eeb52b6e72a039780ce45c3edfcc9c5b9d112feeb173c2"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -2406,7 +2337,7 @@ dependencies = [
  "bytes",
  "libc",
  "mio",
- "parking_lot 0.12.3",
+ "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
  "socket2",
@@ -2422,7 +2353,7 @@ checksum = "6e06d43f1345a3bcd39f6a56dbb7dcab2ba47e68e8ac134855e7e2bdbaf8cab8"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -2461,9 +2392,9 @@ dependencies = [
 
 [[package]]
 name = "toml_edit"
-version = "0.22.22"
+version = "0.22.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ae48d6208a266e853d946088ed816055e556cc6028c5e8e2b84d9fa5dd7c7f5"
+checksum = "02a8b472d1a3d7c18e2d61a489aee3453fd9031c33e4f55bd533f4a7adca1bee"
 dependencies = [
  "indexmap",
  "serde",
@@ -2491,7 +2422,7 @@ checksum = "395ae124c09f9e6918a2310af6038fba074bcf474ac352496d5910dd59a2226d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
@@ -2550,9 +2481,9 @@ checksum = "ccb97dac3243214f8d8507998906ca3e2e0b900bf9bf4870477f125b82e68f6e"
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.15"
+version = "1.0.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11cd88e12b17c6494200a9c1b683a04fcac9573ed74cd1b62aeb2727c5592243"
+checksum = "a210d160f08b701c8721ba1c726c11662f877ea6b7094007e1ca9a1041945034"
 
 [[package]]
 name = "unicode-linebreak"
@@ -2635,6 +2566,15 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
+[[package]]
+name = "wasi"
+version = "0.13.3+wasi-0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26816d2e1a4a36a2940b96c5296ce403917633dff8f3440e9b236ed6f6bacad2"
+dependencies = [
+ "wit-bindgen-rt",
+]
+
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.100"
@@ -2657,7 +2597,7 @@ dependencies = [
  "log",
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
  "wasm-bindgen-shared",
 ]
 
@@ -2679,7 +2619,7 @@ checksum = "8ae87ea40c9f689fc23f209965b6fb8a99ad69aeeb0231408be24920604395de"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -2827,13 +2767,22 @@ checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
 [[package]]
 name = "winnow"
-version = "0.6.24"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8d71a593cc5c42ad7876e2c1fda56f314f3754c084128833e64f1345ff8a03a"
+checksum = "7e49d2d35d3fad69b39b94139037ecfb4f359f08958b9c11e7315ce770462419"
 dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "wit-bindgen-rt"
+version = "0.33.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3268f3d866458b787f390cf61f4bbb563b922d091359f9608842999eaee3943c"
+dependencies = [
+ "bitflags 2.8.0",
+]
+
 [[package]]
 name = "zerocopy"
 version = "0.7.35"
@@ -2852,7 +2801,7 @@ checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.96",
+ "syn 2.0.98",
 ]
 
 [[package]]
diff --git a/crates/pyhq/Cargo.toml b/crates/pyhq/Cargo.toml
index d9eceae65..88949d15f 100644
--- a/crates/pyhq/Cargo.toml
+++ b/crates/pyhq/Cargo.toml
@@ -26,10 +26,10 @@ anyhow = { workspace = true }
 log = { workspace = true }
 tempfile = { workspace = true }
 
-pyo3 = { version = "0.15", features = ["extension-module", "abi3", "abi3-py36", "anyhow", "serde"] }
-pyo3-asyncio = { version = "0.15", features = ["tokio-runtime", "attributes"] }
+pyo3 = { version = "0.18.0", features = ["extension-module", "abi3", "abi3-py39", "anyhow", "serde"] }
+pyo3-asyncio = { version = "0.18.0", features = ["tokio-runtime", "attributes"] }
+pythonize = "0.18.0"
 dict_derive = "0.6.0"
-pythonize = "0.15"
 termcolor = "1.1"
 
 [package.metadata.maturin]
diff --git a/crates/pyhq/pyproject.toml b/crates/pyhq/pyproject.toml
index 549837cb1..4f3a4ac68 100644
--- a/crates/pyhq/pyproject.toml
+++ b/crates/pyhq/pyproject.toml
@@ -8,7 +8,7 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Rust"
 ]
-requires-python = ">=3.6"
+requires-python = ">=3.9"
 description = "HyperQueue Python API"
 dependencies = [
     "cloudpickle>=2.0,<3",
diff --git a/crates/pyhq/src/lib.rs b/crates/pyhq/src/lib.rs
index 359a04f0b..b6a1cb4a3 100644
--- a/crates/pyhq/src/lib.rs
+++ b/crates/pyhq/src/lib.rs
@@ -8,14 +8,14 @@ use pyo3::{wrap_pyfunction, Py, PyResult, Python};
 use std::path::PathBuf;
 use tokio::runtime::Builder;
 
-use hyperqueue::transfer::connection::ClientSession;
+use ::hyperqueue::transfer::connection::ClientSession;
+use ::hyperqueue::HQ_VERSION;
 
 use crate::client::job::{forget_job_impl, FailedTaskMap};
 use crate::cluster::Cluster;
 use crate::utils::run_future;
 use client::job::{get_failed_tasks_impl, submit_job_impl, wait_for_jobs_impl, PyJobDescription};
 use client::server::{connect_to_server_impl, stop_server_impl};
-use hyperqueue::HQ_VERSION;
 
 mod client;
 pub mod cluster;
diff --git a/crates/pyhq/src/marshal.rs b/crates/pyhq/src/marshal.rs
index 29344ea50..b5add63f7 100644
--- a/crates/pyhq/src/marshal.rs
+++ b/crates/pyhq/src/marshal.rs
@@ -46,7 +46,7 @@ pub struct WrappedDuration(Duration);
 
 impl<'a> FromPyObject<'a> for WrappedDuration {
     fn extract(object: &'a PyAny) -> PyResult<Self> {
-        if let Err(_) | Ok(false) = object.is_instance::<PyFloat>() {
+        if let Err(_) | Ok(false) = object.is_instance_of::<PyFloat>() {
             return Err(anyhow::anyhow!(
                 "Duration must be represented as a float containing the total amount of seconds."
             ))
diff --git a/crates/pyhq/src/utils/error.rs b/crates/pyhq/src/utils/error.rs
index 5c1eafb14..9f3681163 100644
--- a/crates/pyhq/src/utils/error.rs
+++ b/crates/pyhq/src/utils/error.rs
@@ -9,7 +9,7 @@ pub(crate) trait ToPyError {
 impl ToPyError for HqError {
     fn to_py(self) -> PyErr {
         Python::with_gil(|py| {
-            PyErr::from_instance(PyException::new_err(format!("{self:?}")).instance(py))
+            PyErr::from_value(PyException::new_err(format!("{self:?}")).value(py))
         })
     }
 }
diff --git a/docs/python/index.md b/docs/python/index.md
index 06c35a1c7..1017c8557 100644
--- a/docs/python/index.md
+++ b/docs/python/index.md
@@ -7,7 +7,7 @@ Python API covers all task definition including all options available through Jo
 You can find the HyperQueue Python API reference [here](apidoc).
 
 ## Requirements
-To use the Python API, you will need at least Python 3.6 and some dependencies that will be installed
+To use the Python API, you will need at least Python 3.9 and some dependencies that will be installed
 automatically using pip.
 
 ## Installation