diff --git a/Gemfile.lock b/Gemfile.lock
index 758e18b..813ef81 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,8 +19,10 @@ GEM
     ffi-compiler (0.1.3)
       ffi (>= 1.0.0)
       rake
+    pkg-config (1.5.5)
     rake (13.0.1)
-    rmagick (4.0.0)
+    rmagick (5.3.0)
+      pkg-config (~> 1.4)
     rqrcode (0.4.2)
     rqrcode_png (0.1.5)
       chunky_png