diff --git a/Gemfile.lock b/Gemfile.lock
index b15e2c8..66fe46d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,8 +33,7 @@ GEM
     rbtree (0.4.5)
     redcarpet (3.5.1)
     regexp_parser (2.9.0)
-    rexml (3.3.2)
-      strscan
+    rexml (3.3.9)
     rspec (3.11.0)
       rspec-core (~> 3.11.0)
       rspec-expectations (~> 3.11.0)
@@ -77,7 +76,6 @@ GEM
     sorted_set (1.0.3)
       rbtree
       set (~> 1.0)
-    strscan (3.1.0)
     toxiproxy (2.0.1)
     unicode-display_width (2.5.0)
     warning (1.2.1)