diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 5c5e8b916..88e929b19 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -99,7 +99,8 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.5.1)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rouge (2.2.1)
     sassc (2.4.0)
       ffi (~> 1.9)
@@ -107,6 +108,7 @@ GEM
     sprockets (4.1.1)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
+    strscan (3.1.0)
     temple (0.8.2)
     thor (1.2.1)
     tilt (2.0.10)