diff --git a/Gemfile.lock b/Gemfile.lock
index b6ab72f7..5f367686 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1422,7 +1422,7 @@ GEM
       net-pop
       net-smtp
     marcel (1.0.2)
-    material_icons (2.2.1)
+    material_icons (4.0.0)
       railties (>= 3.2)
     medium-editor-rails (2.3.1)
       railties (>= 3.0)