diff --git a/Gemfile.lock b/Gemfile.lock
index f6829c67..0e2e0e64 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -234,7 +234,8 @@ GEM
       trailblazer-option (>= 0.1.1, < 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rouge (2.0.7)
     ruby-macho (2.5.1)
     ruby2_keywords (0.0.5)
@@ -255,6 +256,7 @@ GEM
       clamp (~> 1.3)
       nokogiri (>= 1.13.9)
       xcodeproj (~> 1.21)
+    strscan (3.1.0)
     terminal-notifier (2.0.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)