diff --git a/yesod-core.cabal b/yesod-core.cabal
--- a/yesod-core.cabal
+++ b/yesod-core.cabal
@@ -1,5 +1,5 @@
 name:            yesod-core
-version:         0.9.3
+version:         0.9.3.1
 license:         BSD3
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
@@ -50,7 +50,7 @@
                    , shakespeare-css           >= 0.10     && < 0.11
                    , blaze-builder             >= 0.2.1    && < 0.4
                    , transformers              >= 0.2      && < 0.3
-                   , clientsession             >= 0.7.2    && < 0.8
+                   , clientsession             >= 0.7.3.1  && < 0.8
                    , random                    >= 1.0.0.2  && < 1.1
                    , cereal                    >= 0.2      && < 0.4
                    , old-locale                >= 1.0.0.2  && < 1.1