diff --git a/Gemfile.lock b/Gemfile.lock
index 08b3d8f48..a49d05bfe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -325,7 +325,7 @@ GEM
       docile (~> 1.1)
       simplecov-html (~> 0.11)
     simplecov-html (0.12.3)
-    slimmer (15.5.1)
+    slimmer (15.6.1)
       activesupport
       json
       nokogiri (~> 1.7)