diff --git a/Gemfile.lock b/Gemfile.lock
index 292201e..6914fc5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -140,7 +140,9 @@ GEM
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mina (1.2.3)
       open4 (~> 1.3.4)
       rake
@@ -172,7 +174,7 @@ GEM
     qiniu (6.9.0)
       mime-types (~> 3.1)
       rest-client (~> 2.0)
-    rack (2.0.6)
+    rack (2.2.6.2)
     rack-proxy (0.6.4)
       rack
     rack-test (1.1.0)