diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 79a0f88..ee4d62b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,6 +24,7 @@ jobs:
           - "9.6.3"
           - "9.8.1"
           - "9.10.1"
+          - "9.12.1"
 
     steps:
     - uses: actions/checkout@v4
diff --git a/extensions.cabal b/extensions.cabal
index 0a77dba..8e4f824 100644
--- a/extensions.cabal
+++ b/extensions.cabal
@@ -34,7 +34,7 @@ source-repository head
   location:            https://github.com/kowainik/extensions.git
 
 common common-options
-  build-depends:       base >= 4.13.0.0 && < 4.21
+  build-depends:       base >= 4.13.0.0 && < 4.22
 
   ghc-options:         -Wall
                        -Wcompat
@@ -98,7 +98,7 @@ library
                      , containers >= 0.6 && < 0.8
                      , directory ^>= 1.3
                      , filepath >= 1.4 && < 1.6
-                     , ghc-boot-th >= 8.8.1 && < 9.11
+                     , ghc-boot-th >= 8.8.1 && < 9.13
                      , parsec ^>= 3.1
                      , text >= 1.2.3 && < 2.2
 
diff --git a/src/Extensions/Cabal.hs b/src/Extensions/Cabal.hs
index 1d2e502..bcfd8f3 100644
--- a/src/Extensions/Cabal.hs
+++ b/src/Extensions/Cabal.hs
@@ -408,9 +408,6 @@ toGhcExtension = \case
     Cabal.ListTuplePuns                     -> Nothing
 #endif
 #if __GLASGOW_HASKELL__ >= 912
-    -- This branch cannot be satisfied yet but we're including it so
-    -- we don't forget to enable RequiredTypeArguments when it
-    -- becomes available.
     Cabal.NamedDefaults                     -> Just NamedDefaults
     Cabal.MultilineStrings                  -> Just MultilineStrings
     Cabal.OrPatterns                        -> Just OrPatterns