--- a/attoparsec-iso8601.cabal
+++ b/attoparsec-iso8601.cabal
@@ -37,7 +37,7 @@
   build-depends:
     attoparsec >= 0.13.0.1,
     base >= 4.5 && < 5,
-    base-compat >= 0.9.1 && < 0.11,
+    base-compat >= 0.9.1 && < 0.12,
     text >= 1.1.1.0,
     time >= 1.1.1.4
 
