diff --git a/prometheus.cabal b/prometheus.cabal
index c62647fef..0ed260008 100644
--- a/prometheus.cabal
+++ b/prometheus.cabal
@@ -90,8 +90,8 @@ library
                , http-client-tls >= 0.3  && < 0.4
                , http-types      >= 0.8  && < 0.13
                , network-uri     >= 2.5  && < 2.7
-               , text            >= 1.2  && < 1.3
-               , transformers    >= 0.4  && < 0.6
+               , text            >= 1.2  && < 2.1
+               , transformers    >= 0.4  && < 0.7
                , wai             >= 3.2  && < 3.3
                , warp            >= 3.2  && < 3.5
 
diff --git a/stack-8.10.yaml b/stack-8.10.yaml
new file mode 100644
index 000000000..220fffcf6
--- /dev/null
+++ b/stack-8.10.yaml
@@ -0,0 +1,7 @@
+---
+
+resolver: lts-18.28
+flags: {}
+packages:
+  - '.'
+extra-deps: []
diff --git a/stack.yaml b/stack.yaml
index 220fffcf6..708a62be1 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,6 +1,6 @@
 ---
 
-resolver: lts-18.28
+resolver: lts-20.8
 flags: {}
 packages:
   - '.'
diff --git a/stack.yaml.lock b/stack.yaml.lock
index 7af044264..e845f3fe9 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -6,7 +6,7 @@
 packages: []
 snapshots:
 - completed:
-    size: 590100
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/28.yaml
-    sha256: 428ec8d5ce932190d3cbe266b9eb3c175cd81e984babf876b64019e2cbe4ea68
-  original: lts-18.28
+    sha256: bfafe5735ccb74527d754b1f9999ded72d7c3a6c3a88529449661431ccfbd6cc
+    size: 649327
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/20/8.yaml
+  original: lts-20.8