diff --git a/Gemfile.lock b/Gemfile.lock
index 149cf75..31ecb7b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -71,7 +71,8 @@ GEM
     rb-fsevent (0.11.1)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rmagick (4.2.4)
     rouge (3.28.0)
     safe_yaml (1.0.5)
@@ -79,6 +80,7 @@ GEM
       ffi (~> 1.9)
     sassc (2.4.0-x64-mingw32)
       ffi (~> 1.9)
+    strscan (3.1.0)
     terminal-table (2.0.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     unicode-display_width (1.8.0)