diff --git a/url-slug.cabal b/url-slug.cabal
index 9c99d31..2b465c2 100644
--- a/url-slug.cabal
+++ b/url-slug.cabal
@@ -24,7 +24,7 @@ extra-source-files:
 library
   build-depends:
     , aeson
-    , base                >=4.13.0.0 && <=4.18.0.0
+    , base                >=4.13.0.0 && <4.20
     , relude
     , text
     , unicode-transforms