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:             0.1.0.3
+version:             0.1.0.4
 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 && < 1.1,
+    aeson >=0.4 && < 1.2,
     base >= 4.5 && < 4.10,
     ekg-core >= 0.1 && < 0.2,
     text < 1.3,