diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+0.1.1
+=====
+
+*   Drop redundant dependencies on *lens* and *ghc-prim*
+
+*   Fix typo in HTTP header field name `Access-Control-Allow-Credentials`
+
 0.1.0
 =====
 
diff --git a/Confirmed-Constraints b/Confirmed-Constraints
--- a/Confirmed-Constraints
+++ b/Confirmed-Constraints
@@ -1,58 +1,43 @@
 constraints: MonadRandom == 0.1.12
-           , aeson == 0.7.0.2
            , array == 0.4.0.1
            , attoparsec == 0.11.2.1
            , base == 4.6.0.1
            , base-unicode-symbols == 0.2.2.4
-           , bifunctors == 4.1.1
            , blaze-builder == 0.3.3.2
            , bytestring == 0.10.4.0
            , case-insensitive == 1.1.0.3
            , charset == 0.3.7
            , comonad == 4.0
            , conduit == 1.0.15.1
-           , constraints == 0.3.4.2
            , containers == 0.5.0.0
            , contravariant == 0.4.4
            , deepseq == 1.3.0.1
            , directory == 1.2.0.1
            , distributive == 0.4
-           , dlist == 0.6.0.1
            , either == 4.1.1
            , errors == 1.4.5
-           , exceptions == 0.3.3
            , filepath == 1.3.0.1
            , ghc-prim == 0.3.0.0
            , hashable == 1.2.1.0
            , http-types == 0.8.3
            , integer-gmp == 0.5.0.0
-           , lens == 4.0.5
            , lifted-base == 0.2.1.1
            , mmorph == 1.0.2
            , monad-control == 0.3.2.2
            , mtl == 2.1.2
            , nats == 0.1.2
            , network == 2.4.2.2
-           , newtype == 0.2
            , old-locale == 1.0.0.5
-           , parallel == 3.2.0.4
            , parsec == 3.1.5
            , parsers == 0.11
-           , pretty == 1.1.1.0
-           , primitive == 0.5.1.0
-           , profunctors == 4.0.2
            , random == 1.0.1.1
-           , reflection == 1.3.2
            , resourcet == 0.4.10
            , rts == 1.0
            , safe == 0.3.3
            , scientific == 0.2.0.2
            , semigroupoids == 4.0
            , semigroups == 0.12.2
-           , split == 0.2.2
-           , syb == 0.4.1
            , tagged == 0.7
-           , template-haskell == 2.8.0.0
            , text == 1.1.0.1
            , text-stream-decode == 0.1.0.4
            , time == 1.4.0.1
@@ -61,9 +46,6 @@
            , transformers-compat == 0.1.1.1
            , unix == 2.7.0.0
            , unordered-containers == 0.2.3.3
-           , utf8-string == 0.3.7
            , vault == 0.3.0.3
-           , vector == 0.10.9.1
            , void == 0.6.1
            , wai == 1.4.1
-           , zlib == 0.5.4.1
diff --git a/src/Network/Wai/Middleware/Cors.hs b/src/Network/Wai/Middleware/Cors.hs
--- a/src/Network/Wai/Middleware/Cors.hs
+++ b/src/Network/Wai/Middleware/Cors.hs
@@ -264,7 +264,7 @@
     commonCorsHeaders Nothing True = [("Access-Control-Allow-Origin", "*"), ("Vary", "Origin")]
     commonCorsHeaders Nothing False = [("Access-Control-Allow-Origin", "*")]
     commonCorsHeaders (Just (o, False)) _ = [("Access-Control-Allow-Origin", o)]
-    commonCorsHeaders (Just (o, True)) _  = [("Access-Control-Allow-Origin", o), ("Acdess-Control-Allow-Credentials", "true")]
+    commonCorsHeaders (Just (o, True)) _  = [("Access-Control-Allow-Origin", o), ("Access-Control-Allow-Credentials", "true")]
 
     -- HTTP response headers that are only used with normal CORS responses
     --
diff --git a/wai-cors.cabal b/wai-cors.cabal
--- a/wai-cors.cabal
+++ b/wai-cors.cabal
@@ -3,7 +3,7 @@
 -- ------------------------------------------------------ --
 
 Name: wai-cors
-Version: 0.1.0
+Version: 0.1.1
 Synopsis: CORS for WAI
 
 Description:
@@ -45,9 +45,7 @@
         case-insensitive >= 1.0.0.1,
         charset >= 0.3.7,
         errors >= 1.4.1,
-        ghc-prim,
         http-types >= 0.8.0,
-        lens >= 0.4,
         parsers >= 0.11,
         resourcet >= 0.4,
         transformers >= 0.3,