diff --git a/Gemfile.lock b/Gemfile.lock
index d310004..f252e91 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,6 +10,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.5.0)
+    ffi (1.15.5)
     ffi (1.15.5-x64-mingw32)
     mini_magick (4.11.0)
     rake (13.0.6)
@@ -28,13 +29,11 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.10.0)
     rspec-support (3.10.3)
-    webrick (1.7.0)
-    yard (0.9.27)
-      webrick (~> 1.7.0)
+    yard (0.9.36)
 
 PLATFORMS
   x64-mingw32
-  x86-mingw32
+  x86_64-linux
 
 DEPENDENCIES
   rake