diff --git a/slacklinegroups/Gemfile.lock b/slacklinegroups/Gemfile.lock
index e793f8e..720b2cd 100644
--- a/slacklinegroups/Gemfile.lock
+++ b/slacklinegroups/Gemfile.lock
@@ -175,7 +175,7 @@ GEM
     public_suffix (4.0.5)
     puma (4.3.5)
       nio4r (~> 2.0)
-    rack (2.2.3)
+    rack (2.2.6.2)
     rack-pjax (1.1.0)
       nokogiri (~> 1.5)
       rack (>= 1.1)