diff --git a/src/Stackage/Snapshot/Diff.hs b/src/Stackage/Snapshot/Diff.hs
index f3335be..567dd4b 100644
--- a/src/Stackage/Snapshot/Diff.hs
+++ b/src/Stackage/Snapshot/Diff.hs
@@ -38,12 +38,12 @@ instance ToJSON (WithSnapshotNames SnapshotDiff) where
 toDiffList :: SnapshotDiff -> [(PackageName, VersionChange)]
 toDiffList = sortOn (toCaseFold . unPackageName . fst) . HashMap.toList . unSnapshotDiff
 
-versionPrefix :: VersionChange -> Maybe (Text,Text,Text)
+versionPrefix :: VersionChange -> Maybe (Text, Text, Text)
 versionPrefix vc = case unVersionChange vc of
         These (Version a) (Version b) -> T.commonPrefixes a b
         _ -> Nothing
 
-versionedDiffList :: [(PackageName, VersionChange)] -> [(PackageName, VersionChange, Maybe (Text,Text,Text))]
+versionedDiffList :: [(PackageName, VersionChange)] -> [(PackageName, VersionChange, Maybe (Text, Text, Text))]
 versionedDiffList = map withPrefixedVersion
   where
     withPrefixedVersion (packageName, versionChange) = (packageName, versionChange, versionPrefix versionChange)