diff --git a/cabal.project b/cabal.project
index cb43b405..e0ec5633 100644
--- a/cabal.project
+++ b/cabal.project
@@ -1,4 +1,4 @@
-index-state: hackage.haskell.org 2024-05-17T03:42:00Z
+index-state: hackage.haskell.org 2025-01-14T02:09:49Z
 
 packages: ./io-sim
           ./io-classes
@@ -15,3 +15,15 @@ package io-classes
 
 package strict-stm
   flags: +asserts
+
+if impl (ghc >= 9.12)
+  allow-newer:
+    -- Stuck on `cabal-3.14` issues and recalcitrant maintainers
+    -- https://github.com/haskell/aeson/issues/1124
+    , aeson:ghc-prim
+    , aeson:template-haskell
+
+    -- Fix blocked by aeson
+    -- https://github.com/haskellari/microstache/issues/43
+    , microstache:base
+
diff --git a/io-classes-mtl/io-classes-mtl.cabal b/io-classes-mtl/io-classes-mtl.cabal
index a160fd37..e83f4d8d 100644
--- a/io-classes-mtl/io-classes-mtl.cabal
+++ b/io-classes-mtl/io-classes-mtl.cabal
@@ -40,7 +40,7 @@ library
                    ,  Control.Monad.Class.MonadTime.SI.Trans
                    ,  Control.Monad.Class.MonadTimer.Trans
                    ,  Control.Monad.Class.MonadTimer.SI.Trans
-    build-depends:    base >=4.9 && <4.21,
+    build-depends:    base >=4.9 && <4.22,
                       array,
                       mtl,
 
diff --git a/io-classes/io-classes.cabal b/io-classes/io-classes.cabal
index fee614fe..50c5b20f 100644
--- a/io-classes/io-classes.cabal
+++ b/io-classes/io-classes.cabal
@@ -93,7 +93,7 @@ library
                        TypeFamilyDependencies
                        TypeOperators
                        UndecidableInstances
-  build-depends:       base  >=4.9 && <4.21,
+  build-depends:       base  >=4.9 && <4.22,
                        array,
                        async >=2.1,
                        bytestring,
diff --git a/io-sim/io-sim.cabal b/io-sim/io-sim.cabal
index 213bfa5e..8651d2b6 100644
--- a/io-sim/io-sim.cabal
+++ b/io-sim/io-sim.cabal
@@ -75,7 +75,7 @@ library
                        RankNTypes,
                        ScopedTypeVariables,
                        TypeFamilies
-  build-depends:       base              >=4.9 && <4.21,
+  build-depends:       base              >=4.9 && <4.22,
                        io-classes       ^>=1.5,
                        exceptions        >=0.10,
                        containers,
diff --git a/si-timers/si-timers.cabal b/si-timers/si-timers.cabal
index c0ffccf8..b558bc7d 100644
--- a/si-timers/si-timers.cabal
+++ b/si-timers/si-timers.cabal
@@ -53,7 +53,7 @@ library
                        NumericUnderscores,
                        ScopedTypeVariables,
                        TypeFamilies
-  build-depends:       base              >=4.9 && <4.21,
+  build-depends:       base              >=4.9 && <4.22,
                        deepseq,
                        mtl,
                        nothunks,
diff --git a/strict-mvar/strict-mvar.cabal b/strict-mvar/strict-mvar.cabal
index bfc48acd..8757c541 100644
--- a/strict-mvar/strict-mvar.cabal
+++ b/strict-mvar/strict-mvar.cabal
@@ -28,7 +28,7 @@ library
   exposed-modules:     Control.Concurrent.Class.MonadMVar.Strict
   default-language:    Haskell2010
   default-extensions:  ImportQualifiedPost
-  build-depends:       base        >= 4.9 && <4.21,
+  build-depends:       base        >= 4.9 && <4.22,
                        io-classes ^>= 1.5
   ghc-options:         -Wall
                        -Wno-unticked-promoted-constructors
diff --git a/strict-stm/strict-stm.cabal b/strict-stm/strict-stm.cabal
index de06db9c..2f49739a 100644
--- a/strict-stm/strict-stm.cabal
+++ b/strict-stm/strict-stm.cabal
@@ -41,7 +41,7 @@ library
   reexported-modules:  Control.Concurrent.Class.MonadSTM.TSem as Control.Concurrent.Class.MonadSTM.Strict.TSem
   default-language:    Haskell2010
   default-extensions:  ImportQualifiedPost
-  build-depends:       base        >=4.9 && <4.21,
+  build-depends:       base        >=4.9 && <4.22,
                        array,
                        stm         >=2.5 && <2.6,