diff --git a/ClassyPrelude/Yesod.hs b/ClassyPrelude/Yesod.hs
--- a/ClassyPrelude/Yesod.hs
+++ b/ClassyPrelude/Yesod.hs
@@ -15,6 +15,8 @@
 import qualified ClassyPrelude.Classes
 import Database.Persist.GenericSql.Raw as X (SqlBackend, SqlPersist)
 import Database.Persist.GenericSql.Migration as X (runMigration)
+import Data.Default as X (Default (..))
+import Data.Aeson as X (ToJSON (..), FromJSON (..), (.:), (.=))
 
 instance
   ( backend ~ PersistMonadBackend m
diff --git a/classy-prelude-yesod.cabal b/classy-prelude-yesod.cabal
--- a/classy-prelude-yesod.cabal
+++ b/classy-prelude-yesod.cabal
@@ -1,5 +1,5 @@
 name:                classy-prelude-yesod
-version:             0.2.2
+version:             0.2.3
 synopsis:            Provide a classy prelude including common Yesod functionality.
 description:         This is an extension of classy-prelude-conduit, adding in commonly used functions and data types from Yesod.
 homepage:            https://github.com/snoyberg/classy-prelude
@@ -14,11 +14,13 @@
 library
   exposed-modules:     ClassyPrelude.Yesod
   build-depends:       base >= 4 && < 5
-                     , classy-prelude >= 0.5.2
-                     , classy-prelude-conduit >= 0.5.2
+                     , classy-prelude >= 0.5.3
+                     , classy-prelude-conduit >= 0.5.3
                      , yesod
                      , yesod-newsfeed
                      , yesod-static
                      , http-types
                      , http-conduit
                      , persistent >= 1.1
+                     , aeson
+                     , data-default