diff --git a/yesod-core/Yesod/Core/Types.hs b/yesod-core/Yesod/Core/Types.hs
index 5ab13339..6ab28dfd 100644
--- a/yesod-core/Yesod/Core/Types.hs
+++ b/yesod-core/Yesod/Core/Types.hs
@@ -64,6 +64,7 @@ import           Control.Monad.Reader               (MonadReader (..))
 import Prelude hiding (catch)
 #endif
 import Control.DeepSeq (NFData (rnf))
+import Control.DeepSeq.Generics (genericRnf)
 import Data.Conduit.Lazy (MonadActive, monadActive)
 import Yesod.Core.TypeCache (TypeMap, KeyedTypeMap)
 #if MIN_VERSION_monad_logger(0, 3, 10)
@@ -317,7 +318,8 @@ data ErrorResponse =
     | PermissionDenied Text
     | BadMethod H.Method
     deriving (Show, Eq, Typeable, Generic)
-instance NFData ErrorResponse
+instance NFData ErrorResponse where
+    rnf = genericRnf
 
 ----- header stuff
 -- | Headers to be added to a 'Result'.
diff --git a/yesod-core/yesod-core.cabal b/yesod-core/yesod-core.cabal
index 7f674576..ccafa5b9 100644
--- a/yesod-core/yesod-core.cabal
+++ b/yesod-core/yesod-core.cabal
@@ -63,7 +63,8 @@ library
                    , unix-compat
                    , conduit-extra
                    , exceptions            >= 0.6
-                   , deepseq               >= 1.4
+                   , deepseq               >= 1.3
+                   , deepseq-generics
                    , mwc-random
                    , primitive
                    , word8