diff --git a/dub.json b/dub.json
index 339d7c2..9d8f2fc 100644
--- a/dub.json
+++ b/dub.json
@@ -9,7 +9,7 @@
   ],
   "targetType" : "library",
   "dependencies" : {
-    "vibe-d:core" : "~>0.8.0-beta.4",
+    "vibe-d:core" : "~>0.8.0-beta.6",
     "vibe-d:data" : "*",
     "vibe-d:http" : "*",
     "vibe-d:web" : {
diff --git a/source/oauth/webapp.d b/source/oauth/webapp.d
index 6daea3c..a58dbcd 100644
--- a/source/oauth/webapp.d
+++ b/source/oauth/webapp.d
@@ -43,8 +43,7 @@ class OAuthWebapp
     {
         // For assert in oauthSession method
         version(assert) () @trusted {
-            import std.variant : Variant;
-            req.context["oauth.debug.login.checked"] = cast(Variant) true;
+            req.context["oauth.debug.login.checked"] = true;
         } ();
 
         if (!req.session)
@@ -54,8 +53,7 @@ class OAuthWebapp
             settings ? OAuthSession.load(settings, req.session) : null)
         {
             () @trusted {
-                import std.variant : Variant;
-                req.context["oauth.session"] = cast(Variant) session;
+                req.context["oauth.session"] = session;
             } ();
 
             return true;
@@ -97,8 +95,7 @@ class OAuthWebapp
         {
             // For assert in oauthSession method
             version(assert) () @trusted {
-                import std.variant : Variant;
-                req.context["oauth.debug.login.checked"] = cast(Variant) true;
+                req.context["oauth.debug.login.checked"] = true;
             } ();
 
             auto session = settings.userSession(
@@ -143,7 +140,7 @@ class OAuthWebapp
     in
     {
         try
-            assert (req.context.get("oauth.debug.login.checked").get!bool);
+            assert (req.context.get!bool("oauth.debug.login.checked"));
         catch (Exception)
             assert(false);
     }