diff --git a/Gemfile.lock b/Gemfile.lock
index 7ae4a449..665db9bb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,7 +85,8 @@ GEM
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.3.6)
+      strscan
     rouge (3.26.1)
     ruby2_keywords (0.0.5)
     safe_yaml (1.0.5)
@@ -96,6 +97,7 @@ GEM
     sawyer (0.8.2)
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
+    strscan (3.1.0)
     terminal-table (2.0.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)