diff --git a/Gemfile.lock b/Gemfile.lock
index 3becd30..d0e7ea0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -57,11 +57,13 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rouge (4.0.0)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
+    strscan (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.3.0)
@@ -69,6 +71,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin-16
+  x86_64-linux
 
 DEPENDENCIES
   http_parser.rb (~> 0.6.0)