diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index d666df0321..3bdd500762 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -47,7 +47,7 @@ GEM
     method_source (1.0.0)
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2021.0704)
+    mime-types-data (3.2021.0901)
     mini_portile2 (2.5.3)
     minitest (5.14.4)
     msgpack (1.4.2)