diff --git a/Gemfile.lock b/Gemfile.lock
index d596c24c7e3..82c4028ed08 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -166,7 +166,7 @@ GEM
     mail (2.6.6)
       mime-types (>= 1.16, < 4)
     memory_profiler (0.9.8)
-    message_bus (2.0.8)
+    message_bus (2.0.9)
       rack (>= 1.1.3)
     metaclass (0.0.4)
     method_source (0.8.2)