diff --git a/Gemfile.lock b/Gemfile.lock
index b2e0aaa..346e7ce 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,12 @@
+GEM
+  specs:
+
 GEM
   remote: https://rubygems.org/
   specs:
-    rmagick (3.0.0)
+    pkg-config (1.5.5)
+    rmagick (5.3.0)
+      pkg-config (~> 1.4)
 
 PLATFORMS
   ruby