diff --git a/Gemfile.lock b/Gemfile.lock
index 7bdeac4..060058c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,14 +4,12 @@ GEM
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.8)
+    concurrent-ruby (1.3.7)
     em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     eventmachine (1.2.7)
-    eventmachine (1.2.7-x64-mingw32)
     ffi (1.15.0)
-    ffi (1.15.0-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
     i18n (0.9.5)
@@ -71,7 +69,7 @@ GEM
 
 PLATFORMS
   ruby
-  x64-mingw32
+  x64-mingw-ucrt
 
 DEPENDENCIES
   jekyll (= 3.9.0)