diff --git a/hakyll.cabal b/hakyll.cabal
--- a/hakyll.cabal
+++ b/hakyll.cabal
@@ -1,5 +1,5 @@
 Name:    hakyll
-Version: 4.1.2.1
+Version: 4.1.3.0
 
 Synopsis: A static website compiler library
 Description:
diff --git a/src/Hakyll/Web/Tags.hs b/src/Hakyll/Web/Tags.hs
--- a/src/Hakyll/Web/Tags.hs
+++ b/src/Hakyll/Web/Tags.hs
@@ -41,7 +41,7 @@
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
 {-# LANGUAGE OverloadedStrings          #-}
 module Hakyll.Web.Tags
-    ( Tags
+    ( Tags (..)
     , getTags
     , buildTagsWith
     , buildTags