diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index 2f0b1cb..41cf629 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -26,6 +26,11 @@ jobs:
     strategy:
       matrix:
         include:
+          - compiler: ghc-9.0.1
+            compilerKind: ghc
+            compilerVersion: 9.0.1
+            setup-method: hvr-ppa
+            allow-failure: false
           - compiler: ghc-8.10.4
             compilerKind: ghc
             compilerVersion: 8.10.4
diff --git a/sv-cassava/sv-cassava.cabal b/sv-cassava/sv-cassava.cabal
index ebfe246..d4fc28e 100644
--- a/sv-cassava/sv-cassava.cabal
+++ b/sv-cassava/sv-cassava.cabal
@@ -34,7 +34,7 @@ library
     Data.Sv.Cassava
   build-depends:
     attoparsec >= 0.12.1.4 && < 0.15
-    , base >=4.9 && < 4.15
+    , base >=4.9 && < 4.16
     , bytestring >= 0.9.1.10 && < 0.12
     , cassava >= 0.4.1 && < 0.6
     , sv-core >= 0.3 && < 0.6
@@ -54,7 +54,7 @@ test-suite hunit
   default-language:
     Haskell2010
   build-depends:
-    base >=4.9 && < 4.15
+    base >=4.9 && < 4.16
     , bytestring >= 0.9.1.10 && < 0.12
     , cassava >= 0.4.1 && < 0.6
     , sv-core >= 0.3 && < 0.6
diff --git a/sv-core/sv-core.cabal b/sv-core/sv-core.cabal
index 18b9f6e..ef6fe9b 100644
--- a/sv-core/sv-core.cabal
+++ b/sv-core/sv-core.cabal
@@ -50,7 +50,7 @@ library
   other-modules:       Data.Sv.Alien.Containers
   -- other-extensions:    
   build-depends:       attoparsec >= 0.12.1.4 && < 0.15
-                       , base >=4.9 && < 4.15
+                       , base >=4.9 && < 4.16
                        , bifunctors >= 5.1 && < 5.6
                        , bytestring >= 0.9.1.10 && < 0.12
                        , containers >= 0.4 && < 0.7
@@ -86,7 +86,7 @@ test-suite             tasty
   default-language:
                        Haskell2010
   build-depends:
-                       base >=4.9 && < 4.15
+                       base >=4.9 && < 4.16
                        , bytestring >= 0.9.1.10 && < 0.12
                        , semigroupoids >= 5 && < 5.4
                        , sv-core
diff --git a/sv/sv.cabal b/sv/sv.cabal
index 2b59289..fdc359b 100644
--- a/sv/sv.cabal
+++ b/sv/sv.cabal
@@ -92,7 +92,7 @@ library
                        , Data.Sv.Structure
   other-modules:       Data.Sv.Alien.Cassava
   -- other-extensions:    
-  build-depends:       base >=4.9 && < 4.15
+  build-depends:       base >=4.9 && < 4.16
                        , attoparsec >= 0.12.1.4 && < 0.15
                        , bifunctors >= 5.1 && < 5.6
                        , bytestring >= 0.9.1.10 && < 0.12
@@ -121,7 +121,7 @@ test-suite             tasty
   default-language:
                        Haskell2010
   build-depends:
-                       base >=4.9 && < 4.15
+                       base >=4.9 && < 4.16
                        , bytestring >= 0.9.1.10 && < 0.12
                        , cassava >= 0.4.1 && < 0.6
                        , contravariant >= 1.2 && < 1.6
@@ -154,7 +154,7 @@ benchmark criterion
                        Haskell2010
   build-depends:
                          attoparsec >= 0.12.1.4 && < 0.15
-                       , base >=4.9 && < 4.15
+                       , base >=4.9 && < 4.16
                        , bytestring >= 0.9.1.10 && < 0.12
                        , criterion >= 1.3 && < 1.6
                        , deepseq >= 1.1 && < 1.5
diff --git a/weigh/sv-weigh.cabal b/weigh/sv-weigh.cabal
index c65e86c..8ee118c 100644
--- a/weigh/sv-weigh.cabal
+++ b/weigh/sv-weigh.cabal
@@ -28,7 +28,7 @@ executable sv-weigh
   -- other-modules:
   -- other-extensions:
   build-depends:
-      base >=4.9 && <4.15
+      base >=4.9 && <4.16
     , bytestring >= 0.9.1.10 && < 0.12
     , directory >= 1.2 && < 1.4
     , sv == 1.4.*