diff --git a/Stackage/Config.hs b/Stackage/Config.hs
index 5e268d0d..740c65ca 100644
--- a/Stackage/Config.hs
+++ b/Stackage/Config.hs
@@ -333,6 +333,9 @@ defaultStablePackages ghcVer = unPackageMap $ execWriter $ do
     -- https://github.com/fpco/stackage/issues/187
     addRange "Michael Snoyman" "cpphs" "< 1.18.2"
 
+    -- Requires aeson 0.6.*
+    addRange "Michael Snoyman" "threepenny-gui" "< 0.4.1"
+
     -- Depends on a newer version of happy
     addRange "Roman Cheplyaka <roma@ro-che.info>" "pretty-show" "<= 1.6.1"