diff --git a/Gemfile.lock b/Gemfile.lock
index eb0d7af..9257d46 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,7 +14,8 @@ GEM
     hashdiff (1.0.0)
     public_suffix (4.0.6)
     rake (13.0.1)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)
@@ -32,6 +33,7 @@ GEM
       rspec-support (~> 3.9.0)
     rspec-support (3.9.2)
     safe_yaml (1.0.5)
+    strscan (3.1.0)
     webmock (3.8.2)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)