diff --git a/Gemfile.lock b/Gemfile.lock
index 35b6ef8..6b882aa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -247,7 +247,8 @@ GEM
       io-console (~> 0.5)
     request_store (1.6.0)
       rack (>= 1.4)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)
@@ -311,6 +312,7 @@ GEM
       lint_roller (~> 1.0)
       rubocop-rails (~> 2.23.1)
     stringio (3.1.0)
+    strscan (3.1.0)
     tapout (0.4.5)
       ansi
       json