diff --git a/Gemfile.lock b/Gemfile.lock
index f05585b..f3fc039 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,8 +81,7 @@ GEM
     redis-client (0.22.2)
       connection_pool
     regexp_parser (2.9.2)
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     rspec (3.13.0)
       rspec-core (~> 3.13.0)
       rspec-expectations (~> 3.13.0)
@@ -137,7 +136,6 @@ GEM
     standard-performance (1.4.0)
       lint_roller (~> 1.1)
       rubocop-performance (~> 1.21.0)
-    strscan (3.1.0)
     tilt (2.4.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)