diff --git a/Gemfile.lock b/Gemfile.lock
index a1aaa2e..5d7b420 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -466,7 +466,8 @@ GEM
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rspec (3.11.0)
       rspec-core (~> 3.11.0)
       rspec-expectations (~> 3.11.0)
@@ -510,6 +511,7 @@ GEM
       unicode-display_width (>= 1.5, < 3.0)
       unicode_utils (~> 1.4)
     strings-ansi (0.2.0)
+    strscan (3.1.0)
     test-kitchen (3.3.1)
       bcrypt_pbkdf (~> 1.0)
       chef-utils (>= 16.4.35)