diff --git a/Gemfile.lock b/Gemfile.lock
index fa0c5089..5a2b9fbf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -32,7 +32,8 @@ GEM
     rainbow (3.1.1)
     rake (13.1.0)
     regexp_parser (2.9.0)
-    rexml (3.2.6)
+    rexml (3.3.3)
+      strscan
     rghost (0.9.8)
     rghost_barcode (0.9)
     rspec (3.12.0)
@@ -81,6 +82,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     test-prof (1.3.1)
     timecop (0.9.8)
     unicode-display_width (2.5.0)