diff --git a/plugins.cabal b/plugins.cabal
index 14d3c2c..885ede4 100644
--- a/plugins.cabal
+++ b/plugins.cabal
@@ -41,7 +41,7 @@ library
     extensions:           CPP, ForeignFunctionInterface
     ghc-options:          -Wall -funbox-strict-fields -fno-warn-missing-signatures
     hs-source-dirs:       src
-    build-depends:        base  >= 4,
+    build-depends:        base  >= 4 && < 5,
                           Cabal >= 1.6,
                           haskell-src,
                           containers,