diff --git a/snap.cabal b/snap.cabal
--- a/snap.cabal
+++ b/snap.cabal
@@ -1,5 +1,5 @@
 name:           snap
-version:        0.13.0.2
+version:        0.13.0.3
 synopsis:       Top-level package for the Snap Web Framework
 description:
     This is the top-level package for the official Snap Framework libraries.
@@ -147,7 +147,7 @@
     aeson                     >= 0.6      && < 0.7,
     attoparsec                >= 0.10     && < 0.11,
     bytestring                >= 0.9.1    && < 0.11,
-    cereal                    >= 0.3      && < 0.4,
+    cereal                    >= 0.3      && < 0.5,
     clientsession             >= 0.8      && < 0.10,
     comonad                   >= 1.1      && < 3.2,
     configurator              >= 0.1      && < 0.3,
diff --git a/test/snap-testsuite.cabal b/test/snap-testsuite.cabal
--- a/test/snap-testsuite.cabal
+++ b/test/snap-testsuite.cabal
@@ -29,7 +29,7 @@
     aeson                      >= 0.6      && < 0.7,
     attoparsec                 >= 0.10     && < 0.11,
     bytestring                 >= 0.9.1    && < 0.11,
-    cereal                     >= 0.3      && < 0.4,
+    cereal                     >= 0.3      && < 0.5,
     clientsession              >= 0.8      && < 0.10,
     comonad                    >= 1.1      && < 3.2,
     configurator               >= 0.1      && < 0.3,
@@ -101,7 +101,7 @@
     aeson                      >= 0.6      && < 0.7,
     attoparsec                 >= 0.10     && < 0.11,
     bytestring                 >= 0.9.1    && < 0.11,
-    cereal                     >= 0.3      && < 0.4,
+    cereal                     >= 0.3      && < 0.5,
     clientsession              >= 0.8      && < 0.10,
     comonad                    >= 1.1      && < 3.2,
     configurator               >= 0.1      && < 0.3,
@@ -183,7 +183,7 @@
     aeson                      >= 0.6      && < 0.7,
     attoparsec                 >= 0.10     && < 0.11,
     bytestring                 >= 0.9.1    && < 0.11,
-    cereal                     >= 0.3      && < 0.4,
+    cereal                     >= 0.3      && < 0.5,
     clientsession              >= 0.8      && < 0.10,
     comonad                    >= 1.1      && < 3.2,
     configurator               >= 0.1      && < 0.3,