diff --git a/Gemfile.lock b/Gemfile.lock
index 068c788..8abfd82 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -54,10 +54,12 @@ GEM
     public_suffix (4.0.6)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rouge (4.2.0)
     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 (1.6.1)