diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a9f9df6..57aea72 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, macOS-latest ]
-        ghc: [ '8.4', '8.6', '8.8', '8.10', '9.0', '9.2', '9.4', '9.6', '9.8', '9.10' ]
+        ghc: [ '8.4', '8.6', '8.8', '8.10', '9.0', '9.2', '9.4', '9.6', '9.8', '9.10', '9.12' ]
         include:
           - os: ubuntu-latest
             ghc: '8.4'
diff --git a/floskell.cabal b/floskell.cabal
index c3a536c..0ac7ba8 100644
--- a/floskell.cabal
+++ b/floskell.cabal
@@ -56,13 +56,13 @@ library
     default-language: Haskell2010
     ghc-options:      -Wall
     build-depends:
-        base >=4.9 && <4.21,
+        base >=4.9 && <4.22,
         aeson >=0.11.3.0 && <2.3,
         attoparsec >=0.13.1.0 && <0.15,
         attoparsec-aeson >=2.1.0.0 && <2.3,
         bytestring >=0.10.8.1 && <0.13,
         containers >=0.5.7.1 && <0.8,
-        data-default >=0.7.1.1 && <0.8,
+        data-default >=0.7.1.1 && <0.9,
         directory >=1.2.6.2 && <1.4,
         filepath >=1.4.1.0 && <1.6,
         haskell-src-exts >=1.19 && <1.24,
@@ -80,13 +80,13 @@ executable floskell
         -Wall -Wno-missing-home-modules -optP-Wno-nonportable-include-path
 
     build-depends:
-        base >=4.9 && <4.21,
+        base >=4.9 && <4.22,
         floskell -any,
         aeson-pretty >=0.8.2 && <0.9,
         ansi-wl-pprint >=0.6.6 && <1.1,
         bytestring >=0.10.8.1 && <0.13,
         directory >=1.2.6.2 && <1.4,
-        ghc-prim >=0.5.0.0 && <0.12,
+        ghc-prim >=0.5.0.0 && <0.14,
         haskell-src-exts >=1.19 && <1.24,
         optparse-applicative >=0.12.1.0 && <0.19,
         text >=1.2.2.2 && <2.2
@@ -99,7 +99,7 @@ test-suite floskell-test
     default-language: Haskell2010
     ghc-options:      -Wall -threaded -rtsopts -with-rtsopts=-N
     build-depends:
-        base >=4.9 && <4.21,
+        base >=4.9 && <4.22,
         floskell -any,
         bytestring >=0.10.8.1 && <0.13,
         deepseq >=1.4.2.0 && <1.6,
@@ -116,12 +116,12 @@ benchmark floskell-bench
     default-language: Haskell2010
     ghc-options:      -Wall -threaded -rtsopts -with-rtsopts=-N
     build-depends:
-        base >=4.9 && <4.21,
+        base >=4.9 && <4.22,
         floskell -any,
         bytestring >=0.10.8.1 && <0.13,
         criterion >=1.1.1.0 && <1.7,
         deepseq >=1.4.2.0 && <1.6,
         exceptions >=0.8.3 && <0.11,
-        ghc-prim >=0.5.0.0 && <0.12,
+        ghc-prim >=0.5.0.0 && <0.14,
         haskell-src-exts >=1.19 && <1.24,
         text >=1.2.2.2 && <2.2