diff --git a/hanafuda-APILanguage.cabal b/hanafuda-APILanguage.cabal
index 4ef329b..11a86b1 100644
--- a/hanafuda-APILanguage.cabal
+++ b/hanafuda-APILanguage.cabal
@@ -22,7 +22,7 @@ library
   exposed-modules:     Hanafuda.Message
   -- other-extensions:
   build-depends:       aeson
-                     , base >=4.11 && <4.13
+                     , base >=4.9 && <4.13
                      , containers
                      , hanafuda
                      , text