diff --git a/.doc/Gemfile.lock b/.doc/Gemfile.lock
index e9256d483f..208c5f3039 100644
--- a/.doc/Gemfile.lock
+++ b/.doc/Gemfile.lock
@@ -24,11 +24,15 @@ GEM
     liquid (2.3.0)
     maruku (0.6.0)
       syntax (>= 1.0.0)
+    mini_portile2 (2.8.0)
     mustache (0.99.4)
-    nokogiri (1.5.2)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     parslet (1.3.0)
       blankslate (~> 2.0)
     posix-spawn (0.3.6)
+    racc (1.6.0)
     rack (1.4.1)
     rack-protection (1.2.0)
       rack