diff --git a/Gemfile.lock b/Gemfile.lock
index 85f25e86..2a0b0074 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1488,7 +1488,7 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    slack-notifier (2.3.2)
+    slack-notifier (2.4.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)