diff --git a/Gemfile.lock b/Gemfile.lock
index 1a6899e..32379a6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,8 @@ GEM
     public_suffix (4.0.6)
     rainbow (3.0.0)
     rake (13.0.6)
-    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)
@@ -64,6 +65,7 @@ GEM
       rubocop (>= 0.68.1)
     ruby-progressbar (1.11.0)
     ruby2_keywords (0.0.5)
+    strscan (3.1.0)
     timecop (0.9.4)
     unicode-display_width (1.7.0)
     vcr (6.0.0)