diff --git a/Gemfile.lock b/Gemfile.lock
index 48da2e4..f838831 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,7 +30,8 @@ GEM
     rb-fsevent (0.11.1)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.11.0)
       rspec-core (~> 3.11.0)
       rspec-expectations (~> 3.11.0)
@@ -50,6 +51,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     webmock (3.14.0)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)