diff --git a/Gemfile.lock b/Gemfile.lock
index 7384fbb..d806fd0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,9 @@ GEM
     minitest (5.14.4)
     public_suffix (4.0.6)
     rake (13.0.3)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
+    strscan (3.1.0)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.7)