diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 250fda45ef..ff2f8e7e39 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -38,7 +38,7 @@ GEM
       webrobots (>= 0.0.9, < 0.2)
     mime-types (3.3)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2019.0904)
+    mime-types-data (3.2019.1009)
     mini_portile2 (2.4.0)
     minitest (5.12.2)
     mustache (1.1.0)