diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index ca04f98a..b0a54887 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -70,12 +70,14 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.6)
+    rexml (3.3.6)
+      strscan
     rouge (3.30.0)
     rubyzip (2.3.2)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
+    strscan (3.1.0)
     terminal-table (2.0.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     unicode-display_width (1.8.0)