diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
 Revision History for zxcvbn-hs
 ==============================
 
+0.2.1.0 (September 25, 2019)
+----------------------------
+
+  * Export the entire `HasConfig` class so external code can use the
+    `config` lens.
+
 0.2.0.0 (September 12, 2019)
 ----------------------------
 
diff --git a/src/Text/Password/Strength/Config.hs b/src/Text/Password/Strength/Config.hs
--- a/src/Text/Password/Strength/Config.hs
+++ b/src/Text/Password/Strength/Config.hs
@@ -39,12 +39,7 @@
   --     start a sequence.  For example, in English, @a@ and @A@ would
   --     be considered 'True'.
   --
-  passwordLists,
-  wordFrequencyLists,
-  customFrequencyLists,
-  keyboardGraphs,
-  obviousSequenceStart,
-  HasConfig
+  HasConfig(..)
   ) where
 
 import Text.Password.Strength.Internal.Config
diff --git a/src/Text/Password/Strength/Internal/Config.hs b/src/Text/Password/Strength/Internal/Config.hs
--- a/src/Text/Password/Strength/Internal/Config.hs
+++ b/src/Text/Password/Strength/Internal/Config.hs
@@ -20,15 +20,10 @@
 module Text.Password.Strength.Internal.Config (
   -- * Configuration
   Config,
-  HasConfig,
+  HasConfig(..),
   Dictionary,
   en_US,
   dictionaries,
-  passwordLists,
-  wordFrequencyLists,
-  customFrequencyLists,
-  keyboardGraphs,
-  obviousSequenceStart,
   addCustomFrequencyList
   ) where
 
diff --git a/src/Text/Password/Strength/Internal/Match.hs b/src/Text/Password/Strength/Internal/Match.hs
--- a/src/Text/Password/Strength/Internal/Match.hs
+++ b/src/Text/Password/Strength/Internal/Match.hs
@@ -92,7 +92,7 @@
 --------------------------------------------------------------------------------
 -- | All possible matches after various transformations.
 matches :: Config -> Day -> Text -> Matches
-matches config day =
+matches cfg day =
     repeats .
       foldr (\t -> Map.insert t (check t)) Map.empty .
         allTokens
@@ -104,12 +104,12 @@
 
     -- Tokens that appear in a dictionary.
     dict :: Token -> Maybe Match
-    dict t = DictionaryMatch <$> rank config (^. tokenLower) t
+    dict t = DictionaryMatch <$> rank cfg (^. tokenLower) t
 
     -- Tokens that, when reversed, appear in a dictionary.
     rdict :: Token -> Maybe Match
     rdict t = ReverseDictionaryMatch <$>
-                rank config (views tokenLower Text.reverse) t
+                rank cfg (views tokenLower Text.reverse) t
 
     -- Tokens that, when decoded, appear in a dictionary.
     --
@@ -119,7 +119,7 @@
     l33ts :: Token -> Maybe Match
     l33ts t =
       let ts = l33t t -- Decoding may result in multiple outputs.
-          rnk l = (,l) <$> rank config (^. l33tText) l
+          rnk l = (,l) <$> rank cfg (^. l33tText) l
       in uncurry L33tMatch <$>
            minimumByOf traverse (compare `on` (^. _1))
                                 (mapMaybe rnk ts)
@@ -128,7 +128,7 @@
     kbd :: Token -> [Match]
     kbd t = KeyboardMatch <$>
               mapMaybe (`keyboardPattern` t)
-                (config ^. keyboardGraphs)
+                (cfg ^. keyboardGraphs)
 
     -- Characters in a token form a sequence.
     seqMatch :: Token -> Maybe Match
diff --git a/zxcvbn-hs.cabal b/zxcvbn-hs.cabal
--- a/zxcvbn-hs.cabal
+++ b/zxcvbn-hs.cabal
@@ -2,7 +2,7 @@
 
 --------------------------------------------------------------------------------
 name:          zxcvbn-hs
-version:       0.2.0.0
+version:       0.2.1.0
 synopsis:      Password strength estimation based on zxcvbn.
 description:   Please see the README below.
 license:       MIT