diff --git a/src/reducers.js b/src/reducers.js
index 35959fa2..8eeb97c7 100644
--- a/src/reducers.js
+++ b/src/reducers.js
@@ -15,6 +15,12 @@ const appReducer = combineReducers({ ...globalReducers, ...pageReducers });
 const createReducer = () => {
   return (state, action) => {
     const appState = action.type === USER_LOGOUT ? undefined : state;
+
+    // Clear sessionStorage when logging out.
+    if (action.type === USER_LOGOUT && typeof window !== 'undefined' && !!window.sessionStorage) {
+      window.sessionStorage.clear();
+    }
+
     return appReducer(appState, action);
   };
 };