diff --git a/lib/hs/Thrift.cabal b/lib/hs/Thrift.cabal
index c087b59..8dbaaef 100644
--- a/lib/hs/Thrift.cabal
+++ b/lib/hs/Thrift.cabal
@@ -34,7 +34,7 @@
   Hs-Source-Dirs:
     src
   Build-Depends:
-    base == 4, network, ghc-prim, binary, bytestring, HTTP
+    base >= 4, base < 5, network, ghc-prim, binary, bytestring, HTTP
   Exposed-Modules:
     Thrift, Thrift.Protocol, Thrift.Transport, Thrift.Protocol.Binary
     Thrift.Transport.Handle, Thrift.Transport.HttpClient, Thrift.Server