diff --git a/hanafuda-webapp.cabal b/hanafuda-webapp.cabal
index 5498d27..883e88e 100644
--- a/hanafuda-webapp.cabal
+++ b/hanafuda-webapp.cabal
@@ -32,9 +32,9 @@ executable hanafudapi
                      , Server
                      , Session
   -- other-extensions:    
-  build-depends:       base >=4.10 && <4.13
+  build-depends:       base >=4.9 && <4.13
                      , bytestring
-                     , containers
+                     , containers >= 0.5.9
                      , unordered-containers
                      , hanafuda >= 0.3.0
                      , hanafuda-APILanguage