diff --git a/Gemfile.lock b/Gemfile.lock
index 2290316..a7241ff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,8 +36,8 @@ GEM
     racc (1.7.3)
     rainbow (3.1.1)
     regexp_parser (2.8.3)
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
+    rexml (3.3.6)
+      strscan
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)