diff --git a/gems/bundled_gems b/gems/bundled_gems
index 5883a0efe6..c01aa10cca 100644
--- a/gems/bundled_gems
+++ b/gems/bundled_gems
@@ -18,7 +18,7 @@ net-pop             0.1.2   https://github.com/ruby/net-pop
 net-smtp            0.5.1   https://github.com/ruby/net-smtp
 matrix              0.4.2   https://github.com/ruby/matrix
 prime               0.1.3   https://github.com/ruby/prime
-rbs                 3.9.1   https://github.com/ruby/rbs
+rbs                 3.9.1   https://github.com/ruby/rbs 8bf0aa744bc357ec84f1ab491400b7a137879def
 typeprof            0.30.1  https://github.com/ruby/typeprof
 debug               1.10.0   https://github.com/ruby/debug
 racc                1.8.1   https://github.com/ruby/racc