diff --git a/hledger-web/hledger-web.cabal b/hledger-web/hledger-web.cabal
index 1e981456a..c55b85552 100644
--- a/hledger-web/hledger-web.cabal
+++ b/hledger-web/hledger-web.cabal
@@ -81,7 +81,7 @@ executable hledger-web
                  ,yesod-form
                  ,yesod-json
                  ,yesod-static >= 0.3
-                 ,aeson-native
+                 ,aeson-native >= 0.3.3.1
                  ,blaze-html
                  ,clientsession
                  ,data-object