diff --git a/cryptonite.cabal b/cryptonite.cabal
index c6ff823..8d6d902 100644
--- a/cryptonite.cabal
+++ b/cryptonite.cabal
@@ -76,7 +76,7 @@ Library
                    , Crypto.Random.Entropy.Source
                    , Crypto.Random.Entropy.Backend
                    , Crypto.Internal.Compat
-  Build-depends:     base >= 4.5 && < 5
+  Build-depends:     base >= 4.3 && < 5
                    , bytestring
                    , securemem >= 0.1.7
                    , byteable