diff --git a/Gemfile.lock b/Gemfile.lock
index fccb161..342b327 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -181,9 +181,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     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 (0.3.2)
     mini_mime (1.0.1)
     mini_portile2 (2.3.0)