diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 99e033379b26f..dfda741918c0c 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -20,7 +20,7 @@ GEM
     concurrent-ruby (1.1.7)
     connection_pool (2.2.3)
     diff-lcs (1.4.4)
-    docile (1.3.2)
+    docile (1.3.4)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
     elftools (1.1.3)
@@ -118,10 +118,12 @@ GEM
       rubocop
     ruby-macho (2.2.0)
     ruby-progressbar (1.10.1)
-    simplecov (0.19.0)
+    simplecov (0.21.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.2)
     sorbet (0.5.5949)
       sorbet-static (= 0.5.5949)
     sorbet-runtime (0.5.5949)