diff --git a/Gemfile.lock b/Gemfile.lock
index eb55b53..0a567ef 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,8 +4,8 @@ GEM
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.6)
-    ffi (1.12.2-x64-mingw32)
+    concurrent-ruby (1.3.7)
+    ffi (1.12.2)
     forwardable-extended (2.6.0)
     jekyll (3.6.3)
       addressable (~> 2.4)
@@ -49,13 +49,9 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    tzinfo (2.0.1)
-      concurrent-ruby (~> 1.0)
-    tzinfo-data (1.2019.3)
-      tzinfo (>= 1.0.0)
 
 PLATFORMS
-  x64-mingw32
+  x86_64-linux
 
 DEPENDENCIES
   jekyll (~> 3.6.3)