diff --git a/Gemfile.lock b/Gemfile.lock
index 4c97ba5..b1cd6b3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -70,7 +70,8 @@ GEM
     rainbow (3.1.1)
     rake (13.2.1)
     regexp_parser (2.8.3)
-    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)
@@ -129,6 +130,7 @@ GEM
     standard-performance (1.3.0)
       lint_roller (~> 1.1)
       rubocop-performance (~> 1.20.1)
+    strscan (3.1.0)
     timecop (0.9.8)
     timers (4.3.5)
     unicode-display_width (2.5.0)