diff --git a/src/Yesod/ReCaptcha2.hs b/src/Yesod/ReCaptcha2.hs
--- a/src/Yesod/ReCaptcha2.hs
+++ b/src/Yesod/ReCaptcha2.hs
@@ -20,13 +20,12 @@
 import           ClassyPrelude
 import           Data.Aeson
 import           Network.HTTP.Simple
-import           Yesod.Auth
 import           Yesod.Core
 import           Yesod.Form.Functions
 import           Yesod.Form.Types
 
 -- | default key is testing. you should impl reCaptchaSiteKey and reCaptchaSecretKey
-class YesodAuth site => YesodReCaptcha site where
+class YesodReCaptcha site where
   reCaptchaSiteKey :: HandlerFor site Text
   reCaptchaSiteKey = pure "6LeIxAcTAAAAAJcZVRqyHh71UMIEGNQ_MXjiZKhI"
   reCaptchaSecretKey :: HandlerFor site Text
diff --git a/yesod-recaptcha2.cabal b/yesod-recaptcha2.cabal
--- a/yesod-recaptcha2.cabal
+++ b/yesod-recaptcha2.cabal
@@ -1,13 +1,13 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.31.2.
+-- This file has been generated from package.yaml by hpack version 0.33.0.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 0cafa0f7133c8a452ecf0b1ed89843c8196dc8e6fef8abd2bfc61258a823a83c
+-- hash: c1b7cd991705c1ff7b7403cc61f008ac8aad4294d6cd6ca122024733310b443b
 
 name:           yesod-recaptcha2
-version:        1.0.0
+version:        1.0.1
 synopsis:       yesod recaptcha2
 description:    recaptcha2 for yesod-form
 category:       Web
@@ -35,7 +35,6 @@
     , base >=4.7 && <5
     , classy-prelude
     , http-conduit
-    , yesod-auth
     , yesod-core
     , yesod-form
   exposed-modules: