diff --git a/webapp.cabal b/webapp.cabal
--- a/webapp.cabal
+++ b/webapp.cabal
@@ -1,5 +1,5 @@
 Name:                webapp
-Version:             0.3.0
+Version:             0.3.1
 Synopsis:            Haskell web app framework based on WAI & Warp
 Homepage:            https://github.com/fhsjaagshs/webapp
 Bug-reports:         https://github.com/fhsjaagshs/webapp/issues
@@ -34,7 +34,7 @@
                      Web.App.WebApp
   other-modules:     Web.App.Internal.IO
   default-language:  Haskell2010
-  build-depends:     base >= 4.8.0.0 && <= 4.8.1.0,
+  build-depends:     base <4.9,
                      bytestring,
                      base16-bytestring,
                      text,