diff --git a/deepseq.cabal b/deepseq.cabal
index 84562af..b1493cc 100644
--- a/deepseq.cabal
+++ b/deepseq.cabal
@@ -60,7 +60,7 @@ library
   if impl(ghc >=9.0)
     build-depends: ghc-prim
 
-  build-depends: base       >= 4.9 && < 4.19,
+  build-depends: base       >= 4.9 && < 4.20,
                  array      >= 0.4 && < 0.6
   ghc-options: -Wall