diff --git a/Gemfile.lock b/Gemfile.lock
index 50e3ddef1e1d1232d7c6ac0f56fbd2284b7a5773..9d006c35e31075059181f96ceb99b69587271b3d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -449,9 +449,9 @@ GEM
     memoizable (0.4.2)
       thread_safe (~> 0.3, >= 0.3.1)
     method_source (0.9.0)
-    mime-types (3.1)
+    mime-types (3.2.2)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
+    mime-types-data (3.2018.0812)
     mimemagic (0.3.0)
     mini_magick (4.8.0)
     mini_mime (1.0.1)