diff --git a/stm.cabal b/stm.cabal
index cbe714e822e100c35e987cb13e22b8f7a8705d30..690d4933e022e63cb88ebe645d0d2d2131e625e4 100644
--- a/stm.cabal
+++ b/stm.cabal
@@ -53,7 +53,7 @@ library
         build-depends: semigroups >=0.18.6 && <0.21
 
     build-depends:
-        base  >= 4.4 && < 4.18,
+        base  >= 4.4 && < 4.19,
         array >= 0.3 && < 0.6
 
     exposed-modules: