diff --git a/unix.cabal b/unix.cabal
index a73d8548618ac808a435cea8bc0f2197742db0de..dfb565ca3633b914223b7e2c1f21bf32ceacffb5 100644
--- a/unix.cabal
+++ b/unix.cabal
@@ -74,7 +74,7 @@ library
         buildable: False
 
     build-depends:
-        base        >= 4.12.0.0  && < 4.20,
+        base        >= 4.12.0.0  && < 4.21,
         bytestring  >= 0.9.2     && < 0.13,
         time        >= 1.9.1     && < 1.13