1 files changed, 5 insertions, 1 deletions
diff --git a/src/background/infrastructures/memory-storage.js b/src/background/infrastructures/memory-storage.js
index 234a9b8..3a7e4f2 100644
--- a/src/background/infrastructures/memory-storage.js
+++ b/src/background/infrastructures/memory-storage.js
@@ -10,6 +10,10 @@ export default class MemoryStorage {
   }
 
   get(name) {
-    return JSON.parse(db[name]);
+    let data = db[name];
+    if (!data) {
+      return undefined;
+    }
+    return JSON.parse(data);
   }
 }