diff --git a/hoauth2-providers-tutorial.cabal b/hoauth2-providers-tutorial.cabal
--- a/hoauth2-providers-tutorial.cabal
+++ b/hoauth2-providers-tutorial.cabal
@@ -1,9 +1,9 @@
 cabal-version: 2.4
 name:          hoauth2-providers-tutorial
-version:       0.9.0
-synopsis:      tutorial for hoauth2-providers module
+version:       0.9.1
+synopsis:      Tutorial for the hoauth2-providers module
 description:
-  A tutorial that demostrates how to use hoauth2-providers package
+  A tutorial that demonstrates how to use the hoauth2-providers package
   for OAuth2 Authorization Code flow.
 
 license:       MIT
@@ -18,7 +18,7 @@
   build-depends:
     , base               >=4.11   && <5
     , bytestring         >=0.9    && <0.13
-    , containers         >=0.6    && <0.8
+    , containers         >=0.6    && <0.9
     , hoauth2            >=2.9    && <2.16
     , hoauth2-providers  >=0.3    && <0.10
     , http-conduit       >=2.1    && <2.4
diff --git a/src/HOAuth2ProvidersTutorial.hs b/src/HOAuth2ProvidersTutorial.hs
--- a/src/HOAuth2ProvidersTutorial.hs
+++ b/src/HOAuth2ProvidersTutorial.hs
@@ -77,7 +77,7 @@
       idp = Google.defaultGoogleIdp
    in IdpApplication {..}
 
--- | You'll need to find out an better way to create @state@
+-- | You'll need to find a better way to create @state@
 -- which is recommended in <https://www.rfc-editor.org/rfc/rfc6749#section-10.12>
 randomStateValue :: TL.Text
 randomStateValue = "random-state-to-prevent-csrf"
@@ -176,7 +176,7 @@
     user <- case idpName of
       "google" -> handleGoogleCallback googleApp code
       "auth0" -> handleAuth0Callback auth0App code
-      _ -> throwE $ "unable to find idp app of: " <> idpName
+      _ -> throwE $ "Unable to find IdP app for: " <> idpName
 
     liftIO $ writeIORef refUser (Just user)
 
@@ -219,7 +219,7 @@
   Either TL.Text TL.Text
 paramValue key params =
   case val of
-    [] -> Left ("No value found for param: " <> key)
+    [] -> Left ("No value found for parameter: " <> key)
     (x : _) -> Right x
   where
     val = snd <$> filter (hasParam key) params
@@ -233,4 +233,4 @@
   either Scotty.raise pure result
 
 oauth2ErrorToText :: TokenResponseError -> TL.Text
-oauth2ErrorToText e = TL.pack $ "Unable fetch access token. error detail: " ++ show e
+oauth2ErrorToText e = TL.pack $ "Unable to fetch access token. Error detail: " ++ show e