diff -r dbcee57de2c6 -r 2a861fed6bde client/src/sagas/networkSaga.js
--- a/client/src/sagas/networkSaga.js	Mon Jun 26 15:21:06 2017 +0200
+++ b/client/src/sagas/networkSaga.js	Mon Jun 26 16:05:47 2017 +0200
@@ -11,7 +11,6 @@
 }
 
 function pingServer(client, token) {
-  console.log("PING SERVER", token);
   if(token) {
     const timeout = new Promise((resolve, reject) => {
       setTimeout(reject, config.networkStatusTimeout, 'request timed out');
@@ -39,6 +38,16 @@
     // if the error is that there is no token, then we know we have to wait for a login
     if(error.error && error.error === 'No token in the store') {
       yield take(types.AUTH_LOGIN_SUCCESS);
+    } else if (error.non_field_errors &&
+      error.non_field_errors &&
+      error.non_field_errors.length &&
+      error.non_field_errors.length > 0 &&
+      ( error.non_field_errors[0] === 'Signature has expired.' ||
+        error.non_field_errors[0] === 'Refresh has expired.' )
+    ) {
+      yield put({
+        type: types.AUTH_DEAUTHENTICATE
+      });
     }
   } finally {
     if (yield cancelled()) {