diff --git a/Gemfile.lock b/Gemfile.lock
index a2769f6..bb23f09 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -359,7 +359,8 @@ GEM
     responders (3.1.0)
       actionpack (>= 5.2)
       railties (>= 5.2)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -450,6 +451,7 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
+    strscan (3.1.0)
     terrapin (0.6.0)
       climate_control (>= 0.0.3, < 1.0)
     terser (1.1.14)