diff --git a/Gemfile.lock b/Gemfile.lock
index ae31e07..deff847 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -102,7 +102,8 @@ GEM
     racc (1.7.3)
     rainbow (3.1.1)
     regexp_parser (2.9.2)
-    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)
@@ -148,6 +149,7 @@ GEM
     standard-performance (1.4.0)
       lint_roller (~> 1.1)
       rubocop-performance (~> 1.21.0)
+    strscan (3.1.0)
     thor (1.2.2)
     toml-rb (3.0.1)
       citrus (~> 3.0, > 3.0)