diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,8 @@
+## 1.2.5
+
+* Increased the upper-bound of base to allow < 4.9. Now builds on
+  GHC 7.10.1.
+
 ## 1.2.4
 
 * Add a 100ms delay in the WebSocket upgrade process. This matches the
diff --git a/engine-io.cabal b/engine-io.cabal
--- a/engine-io.cabal
+++ b/engine-io.cabal
@@ -1,5 +1,5 @@
 name: engine-io
-version: 1.2.4
+version: 1.2.5
 synopsis: A Haskell implementation of Engine.IO
 homepage: http://github.com/ocharles/engine.io
 license: BSD3
@@ -30,7 +30,7 @@
     aeson >=0.7 && <0.9,
     async >=2.0 && <2.1,
     attoparsec >=0.11 && <0.13,
-    base >=4.6 && <4.8,
+    base >=4.6 && <4.9,
     base64-bytestring >=1.0 && <1.1,
     bytestring >=0.10.2.0 && <0.11,
     either >= 3.4 && <4.4,