diff --git a/Gemfile.lock b/Gemfile.lock
index 8adb058..272d565 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -164,7 +164,8 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (2.0.0)
-    rexml (3.2.4)
+    rexml (3.3.6)
+      strscan
     rubocop (1.4.2)
       parallel (~> 1.10)
       parser (>= 2.7.1.5)
@@ -197,6 +198,7 @@ GEM
     standard (0.10.2)
       rubocop (= 1.4.2)
       rubocop-performance (= 1.9.1)
+    strscan (3.1.0)
     thor (1.0.1)
     tzinfo (2.0.3)
       concurrent-ruby (~> 1.0)