diff --git a/slate/Gemfile.lock b/slate/Gemfile.lock
index 698249037..ad0829520 100644
--- a/slate/Gemfile.lock
+++ b/slate/Gemfile.lock
@@ -121,7 +121,8 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.5.1)
-    rexml (3.2.5)
+    rexml (3.3.6)
+      strscan
     rouge (3.26.0)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -136,6 +137,7 @@ GEM
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
+    strscan (3.1.0)
     temple (0.8.2)
     thor (1.1.0)
     thread_safe (0.3.6)