diff --git a/Gemfile.lock b/Gemfile.lock
index bdd2f31..25180a2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -139,7 +139,8 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.6)
+    rexml (3.3.3)
+      strscan
     rouge (4.2.1)
     ruby-rc4 (0.1.5)
     safe_yaml (1.0.5)
@@ -174,6 +175,7 @@ GEM
     sawyer (0.9.2)
       addressable (>= 2.3.5)
       faraday (>= 0.17.3, < 3)
+    strscan (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     timers (4.3.5)