diff --git a/CHANGES.md b/CHANGES.md
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,7 @@
+## 0.1.0.5 (2017-04-19)
+
+ * Support aeson 1.2.
+
 ## 0.1.0.3 (2016-09-14)
 
  * Support aeson 1.0.
diff --git a/ekg-json.cabal b/ekg-json.cabal
--- a/ekg-json.cabal
+++ b/ekg-json.cabal
@@ -1,5 +1,5 @@
 name:                ekg-json
-version:             0.1.0.4
+version:             0.1.0.5
 synopsis:            JSON encoding of ekg metrics
 description:
   Encodes ekg metrics as JSON, using the same encoding as used by the
@@ -20,7 +20,7 @@
   exposed-modules:
     System.Metrics.Json
   build-depends:
-    aeson >=0.4 && < 1.2,
+    aeson >=0.4 && < 1.3,
     base >= 4.5 && < 4.10,
     ekg-core >= 0.1 && < 0.2,
     text < 1.3,