diff --git a/Chapter02/pichat-api-attachments-service/Gemfile.lock b/Chapter02/pichat-api-attachments-service/Gemfile.lock
index e7997df..0615e82 100644
--- a/Chapter02/pichat-api-attachments-service/Gemfile.lock
+++ b/Chapter02/pichat-api-attachments-service/Gemfile.lock
@@ -122,7 +122,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (12.2.1)
+    rake (13.0.1)
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)