diff --git a/Gemfile.lock b/Gemfile.lock
index 0a39fae..f189282 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -153,7 +153,8 @@ GEM
       declarative-option (< 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rouge (2.0.7)
     ruby2_keywords (0.0.4)
     rubyzip (2.3.0)
@@ -167,6 +168,7 @@ 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)