diff --git a/Gemfile b/Gemfile
index 9c7970ed5..9b8a704da 100644
--- a/Gemfile
+++ b/Gemfile
@@ -120,7 +120,7 @@ source "https://rails-assets.org" do
   gem "rails-assets-jquery.are-you-sure",                 "1.9.0"
   gem "rails-assets-jquery-placeholder",                  "2.3.1"
   gem "rails-assets-jquery-textchange",                   "0.2.3"
-  gem "rails-assets-utatti-perfect-scrollbar",            "1.3.0"
+  gem "rails-assets-utatti-perfect-scrollbar",            "1.4.0"
 end
 
 gem "markdown-it-html5-embed", "1.0.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index 388dc7768..989f59814 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -557,7 +557,7 @@ GEM
     rails-assets-markdown-it-sub (1.0.0)
     rails-assets-markdown-it-sup (1.0.0)
     rails-assets-underscore (1.8.3)
-    rails-assets-utatti-perfect-scrollbar (1.3.0)
+    rails-assets-utatti-perfect-scrollbar (1.4.0)
     rails-controller-testing (1.0.2)
       actionpack (~> 5.x, >= 5.0.1)
       actionview (~> 5.x, >= 5.0.1)
@@ -864,7 +864,7 @@ DEPENDENCIES
   rails-assets-markdown-it-sanitizer (= 0.4.3)!
   rails-assets-markdown-it-sub (= 1.0.0)!
   rails-assets-markdown-it-sup (= 1.0.0)!
-  rails-assets-utatti-perfect-scrollbar (= 1.3.0)!
+  rails-assets-utatti-perfect-scrollbar (= 1.4.0)!
   rails-controller-testing (= 1.0.2)
   rails-i18n (= 5.1.1)
   rails-timeago (= 2.16.0)