diff --git a/Gemfile.lock b/Gemfile.lock
index e1b0137..ee62ce9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -39,7 +39,8 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.5.0)
       rspec-core (~> 3.5.0)
       rspec-expectations (~> 3.5.0)
@@ -67,6 +68,7 @@ GEM
       parser (>= 3.2.1.0)
     ruby-progressbar (1.13.0)
     safe_yaml (1.0.4)
+    strscan (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     thor (0.19.4)