diff --git a/Gemfile.lock b/Gemfile.lock
index 7873825..5033dbd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -275,7 +275,8 @@ GEM
     responders (3.0.1)
       actionpack (>= 5.0)
       railties (>= 5.0)
-    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)
@@ -331,6 +332,7 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
+    strscan (3.1.0)
     thor (1.3.1)
     tilt (2.0.11)
     timeout (0.4.1)