diff --git a/package.json b/package.json
index ac90d24..4c92248 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     "readable-stream": "^2.0.5",
     "ursa-purejs": "^0.0.3",
     "uuid-1345": "^0.99.6",
-    "yggdrasil": "^0.1.0"
+    "yggdrasil": "^0.2.0"
   },
   "optionalDependencies": {
     "ursa": "^0.9.1"
diff --git a/src/client/caseCorrect.js b/src/client/caseCorrect.js
index e56941c..23e2a55 100644
--- a/src/client/caseCorrect.js
+++ b/src/client/caseCorrect.js
@@ -21,11 +21,11 @@ module.exports = function(client, options) {
     };
 
     if (options.session) {
-      yggdrasil.validate(options.session.accessToken, function(ok) {
-        if (ok)
+      yggdrasil.validate(options.session.accessToken, function(err) {
+        if (!err)
           cb(null, options.session);
         else
-          yggdrasil.refresh(options.session.accessToken, options.session.clientToken, function(err, _, data) {
+          yggdrasil.refresh(options.session.accessToken, options.session.clientToken, function(err, data) {
             cb(err, data);
           });
       });