diff --git a/volume/blog-backend/Gemfile.lock b/volume/blog-backend/Gemfile.lock
index 90a6282..2e82a51 100644
--- a/volume/blog-backend/Gemfile.lock
+++ b/volume/blog-backend/Gemfile.lock
@@ -108,7 +108,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.4)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
@@ -167,7 +169,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.4)
+    rexml (3.2.5)
     rspec-core (3.9.1)
       rspec-support (~> 3.9.1)
     rspec-expectations (3.9.0)