diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,7 @@
+0.9.1.3
+-------
+* Increase cereal upper bound to <0.6
+
 0.9.1.2
 -------
 * Increase aeson upper bound to <0.11
diff --git a/eventstore.cabal b/eventstore.cabal
--- a/eventstore.cabal
+++ b/eventstore.cabal
@@ -10,7 +10,7 @@
 -- PVP summary:      +-+------- breaking API changes
 --                   | | +----- non-breaking API additions
 --                   | | | +--- code changes with no API change
-version:             0.9.1.2
+version:             0.9.1.3
 
 tested-with: GHC >= 7.8.3 && < 7.11
 
@@ -103,7 +103,7 @@
                      , aeson      >=0.8      && <0.11
                      , async      >=2.0      && <2.1
                      , bytestring >=0.10.4   && <0.11
-                     , cereal     >=0.4      && <0.5
+                     , cereal     >=0.4      && <0.6
                      , containers >=0.5      && <0.6
                      , network    ==2.6.*
                      , protobuf   >=0.2      && <0.3