diff --git a/Gemfile.lock b/Gemfile.lock
index 66a270b..fe2be19 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,8 @@ GEM
     public_suffix (4.0.6)
     rake (13.0.3)
     rb-readline (0.5.5)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rspec (3.11.0)
       rspec-core (~> 3.11.0)
       rspec-expectations (~> 3.11.0)
@@ -63,6 +64,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     vcr (6.1.0)
     webmock (3.12.0)
       addressable (>= 2.3.6)