diff --git a/Gemfile.lock b/Gemfile.lock
index 66064703c7..56f57dbd12 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,8 @@ GEM
       ast (~> 2.4.1)
     rainbow (3.0.0)
     regexp_parser (2.1.1)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)
@@ -46,6 +47,7 @@ GEM
       terminal-table
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.3)
+    strscan (3.1.0)
     terminal-table (3.0.1)
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.0.0)