diff --git a/icons/Gemfile.lock b/icons/Gemfile.lock
index 8b6aca6a..e8da8e41 100644
--- a/icons/Gemfile.lock
+++ b/icons/Gemfile.lock
@@ -1,7 +1,9 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    rmagick (4.2.2)
+    pkg-config (1.5.9)
+    rmagick (5.3.0)
+      pkg-config (~> 1.4)
 
 PLATFORMS
   ruby