diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a7a3179..3dc455a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,12 +14,13 @@ jobs:
           - "8.6.5"
           - "8.8.4"
           - "8.10.4"
+          - "9.0.1"
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-haskell@v1
+    - uses: haskell/actions/setup@v1
       with:
-        cabal-version: "3.2"
+        cabal-version: "3.4"
         ghc-version: ${{ matrix.ghc-version }}
     - name: Cache
       uses: actions/cache@v1
diff --git a/shower.cabal b/shower.cabal
index dbb4d81..f3597d8 100644
--- a/shower.cabal
+++ b/shower.cabal
@@ -28,7 +28,7 @@ library
     Shower.Parser
     Shower.Class
   build-depends:
-    base >=4.10 && <4.15,
+    base >=4.10 && <4.16,
     megaparsec,
     pretty
   hs-source-dirs: lib
@@ -38,7 +38,7 @@ library
 executable shower
   main-is: Main.hs
   build-depends:
-    base >=4.10 && <4.15,
+    base >=4.10 && <4.16,
     shower
   hs-source-dirs: exe
   default-language: Haskell2010
@@ -50,7 +50,7 @@ test-suite shower-tests
     Property
   type: exitcode-stdio-1.0
   build-depends:
-    base >=4.10 && <4.15,
+    base >=4.10 && <4.16,
     aeson,
     tasty,
     tasty-golden,