diff --git a/protocol-buffers.cabal b/protocol-buffers.cabal
--- a/protocol-buffers.cabal
+++ b/protocol-buffers.cabal
@@ -1,5 +1,5 @@
 name:           protocol-buffers
-version:        2.1.1
+version:        2.1.2
 cabal-version:  >= 1.6
 build-type:     Simple
 license:        BSD3
@@ -33,7 +33,7 @@
                    Text.ProtocolBuffers.Unknown
                    Text.ProtocolBuffers.WireMessage
 
-  build-depends: base >= 4.3.0 && < 5,
+  build-depends: base >= 4.7.0 && < 5,
                  array,
                  binary,
                  bytestring,