diff --git a/Gemfile.lock b/Gemfile.lock
index d118789..4008827 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,7 +101,8 @@ GEM
     regexp_parser (2.9.0)
     reline (0.5.0)
       io-console (~> 0.5)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)
@@ -166,6 +167,7 @@ GEM
       syntax_tree (>= 6.1.1)
       thor (>= 0.19.2)
     stringio (3.1.0)
+    strscan (3.1.0)
     syntax_tree (6.2.0)
       prettier_print (>= 1.2.0)
     tapioca (0.12.0)