diff --git a/Gemfile.lock b/Gemfile.lock
index b0769eb2..7fe78b14 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -365,7 +365,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rbs (3.8.1)
+    rbs (3.9.4)
       logger
     rdoc (6.13.1)
       psych (>= 4.0.0)