diff --git a/Gemfile.lock b/Gemfile.lock
index 01714c7..4abac1e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -152,7 +152,8 @@ GEM
       declarative-option (< 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rouge (2.0.7)
     ruby2_keywords (0.0.4)
     rubyzip (2.3.0)
@@ -166,6 +167,7 @@ GEM
       CFPropertyList
       naturally
     slack-notifier (2.3.2)
+    strscan (3.1.0)
     terminal-notifier (2.0.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)