diff --git a/Gemfile.lock b/Gemfile.lock
index ff95debd..85e42f5e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -59,13 +59,15 @@ GEM
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     ruby2_keywords (0.0.5)
     signet (0.17.0)
       addressable (~> 2.8)
       faraday (>= 0.17.5, < 3.a)
       jwt (>= 1.5, < 3.0)
       multi_json (~> 1.10)
+    strscan (3.1.0)
     trailblazer-option (0.1.2)
     uber (0.1.0)
     webrick (1.8.1)