diff --git a/Gemfile.lock b/Gemfile.lock
index 0a70402..0e25450 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -76,7 +76,8 @@ GEM
     rainbow (3.0.0)
     rake (13.0.6)
     regexp_parser (2.2.0)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)
@@ -105,6 +106,7 @@ GEM
       parser (>= 3.0.1.1)
     ruby-progressbar (1.11.0)
     ruby2_keywords (0.0.5)
+    strscan (3.1.0)
     unicode-display_width (2.1.0)
     webmock (3.14.0)
       addressable (>= 2.8.0)