diff --git a/Gemfile.lock b/Gemfile.lock
index 08df2d9..6bde2ca 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,12 +1,12 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    device_api (1.0.0)
-    rmagick (2.13.4)
+    pkg-config (1.5.5)
+    rmagick (5.3.0)
+      pkg-config (~> 1.4)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  device_api
   rmagick