diff --git a/Chapter02/pichat-api-attachments-service/Gemfile.lock b/Chapter02/pichat-api-attachments-service/Gemfile.lock
index e7997df..f1e14cc 100644
--- a/Chapter02/pichat-api-attachments-service/Gemfile.lock
+++ b/Chapter02/pichat-api-attachments-service/Gemfile.lock
@@ -47,7 +47,7 @@ GEM
     database_cleaner (1.6.2)
     diff-lcs (1.3)
     erubi (1.7.0)
-    excon (0.59.0)
+    excon (0.71.0)
     factory_bot (4.8.2)
       activesupport (>= 3.0.0)
     factory_bot_rails (4.8.2)