diff --git a/Library/.rubocop.yml b/Library/.rubocop.yml
index 7fca2f268c..7cb07e6f70 100644
--- a/Library/.rubocop.yml
+++ b/Library/.rubocop.yml
@@ -280,9 +280,14 @@ RSpec/Focus:
 Sorbet/ConstantsFromStrings:
   Enabled: false
 
+# This is already the default
 Sorbet/FalseSigil:
   Enabled: false
 
+# T::Sig is monkey-patched into Module
+Sorbet/RedundantExtendTSig:
+  Enabled: true
+
 Sorbet/StrictSigil:
   inherit_mode:
     override: