diff --git a/Gemfile.lock b/Gemfile.lock
index b377daa..37bd37f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,8 @@ GEM
     rake (13.0.6)
     rbtree (0.4.6)
     regexp_parser (2.6.2)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -80,6 +81,7 @@ GEM
     sorted_set (1.0.3)
       rbtree
       set (~> 1.0)
+    strscan (3.1.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.4.2)