diff --git a/stan.cabal b/stan.cabal
index e83b88a..f22fba1 100644
--- a/stan.cabal
+++ b/stan.cabal
@@ -138,7 +138,7 @@ library
                      , base64 ^>= 0.4.1
                      , blaze-html ^>= 0.9.1
                      , bytestring >= 0.10 && < 0.13
-                     , clay ^>= 0.14
+                     , clay >= 0.14 && < 0.16
                      , colourista >= 0.1 && < 0.3
                      , containers >= 0.5 && < 0.7
                      , cryptohash-sha1 ^>= 0.11