diff --git a/mongo/Gemfile.lock b/mongo/Gemfile.lock
index 4fe793c..976bae8 100644
--- a/mongo/Gemfile.lock
+++ b/mongo/Gemfile.lock
@@ -34,7 +34,8 @@ GEM
     rainbow (3.1.1)
     rake (13.0.6)
     regexp_parser (2.8.0)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rubocop (1.50.2)
       json (~> 2.3)
       parallel (~> 1.10)
@@ -62,6 +63,7 @@ GEM
     standard-performance (1.0.1)
       lint_roller (~> 1.0)
       rubocop-performance (~> 1.16.0)
+    strscan (3.1.0)
     unicode-display_width (2.4.2)
 
 PLATFORMS