diff --git a/Gemfile.lock b/Gemfile.lock
index 4fd8bba..0b10d3a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -79,7 +79,8 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.3.3)
+      strscan
     rouge (4.1.0)
     ruby2_keywords (0.0.5)
     safe_yaml (1.0.5)
@@ -92,6 +93,7 @@ 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)
     unicode-display_width (2.4.2)