diff --git a/Gemfile.lock b/Gemfile.lock
index f81d8dd..e02e1eb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -118,7 +118,8 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (2.9.0)
-    rexml (3.2.6)
+    rexml (3.3.3)
+      strscan
     rouge (4.2.0)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)
@@ -148,6 +149,7 @@ GEM
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
+    strscan (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.5.0)