diff --git a/Gemfile.lock b/Gemfile.lock
index 301a9cc..18435f6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,8 +18,7 @@ GEM
       rack
     rainbow (3.0.0)
     regexp_parser (2.1.1)
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)
@@ -51,7 +50,6 @@ GEM
       rack (~> 2.2)
       rack-protection (= 2.2.3)
       tilt (~> 2.0)
-    strscan (3.1.0)
     tilt (2.0.11)
     unicode-display_width (2.0.0)
     webrick (1.7.0)