diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 See full history at: <https://github.com/faylang/fay/commits>
 
+#### 0.23.1.5
+
+* Allow `aeson 0.9.*`
+
 #### 0.23.1.4
 
 * Fix compilation on at least GHC 7.6 (maybe older versions as well...)
diff --git a/fay.cabal b/fay.cabal
--- a/fay.cabal
+++ b/fay.cabal
@@ -1,5 +1,5 @@
 name:                fay
-version:             0.23.1.4
+version:             0.23.1.5
 synopsis:            A compiler for Fay, a Haskell subset that compiles to JavaScript.
 description:         Fay is a proper subset of Haskell which is type-checked
                      with GHC, and compiled to JavaScript. It is lazy, pure, has a Fay monad,
@@ -136,7 +136,7 @@
 
   build-depends:
       base >= 4 && < 4.9
-    , aeson > 0.6 && < 0.9
+    , aeson > 0.6 && < 0.10
     , bytestring < 0.11
     , containers < 0.6
     , data-default < 0.6