diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,7 @@
+## 1.3.6
+
+* Increased the upper-bound of `base` and `transformers`.
+
 ## 1.3.5
 
 * Increase upper-bound of `aeson` to < 0.12.
diff --git a/socket-io.cabal b/socket-io.cabal
--- a/socket-io.cabal
+++ b/socket-io.cabal
@@ -1,5 +1,5 @@
 name: socket-io
-version: 1.3.5
+version: 1.3.6
 homepage: http://github.com/ocharles/engine.io
 license: BSD3
 license-file: LICENSE
@@ -24,13 +24,13 @@
   build-depends:
     aeson >=0.7 && <0.12,
     attoparsec >=0.10 && <0.14,
-    base >=4.6 && <4.9,
+    base >=4.6 && <4.10,
     bytestring >=0.10 && <0.11,
     engine-io >= 1 && <1.3,
     mtl >=2.1 && <2.3,
     stm >=2.4 && <2.5,
     text >=0.11 && <1.3,
-    transformers >=0.2 && <0.5,
+    transformers >=0.2 && <0.6,
     unordered-containers >=0.2 && <0.3,
     vector >=0.10 && <0.12