diff --git a/Gemfile.lock b/Gemfile.lock
index ec23ad5..76f645c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,7 +22,8 @@ GEM
     hashie (3.6.0)
     public_suffix (5.0.0)
     rake (13.0.6)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -43,6 +44,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     webmock (3.18.1)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)