diff --git a/.doc/Gemfile.lock b/.doc/Gemfile.lock
index e9256d483f..91140dd1c6 100644
--- a/.doc/Gemfile.lock
+++ b/.doc/Gemfile.lock
@@ -25,17 +25,20 @@ GEM
     maruku (0.6.0)
       syntax (>= 1.0.0)
     mustache (0.99.4)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     nokogiri (1.5.2)
     parslet (1.3.0)
       blankslate (~> 2.0)
     posix-spawn (0.3.6)
-    rack (1.4.1)
-    rack-protection (1.2.0)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     redcarpet (2.1.1)
     rocco (0.8.2)
       mustache
       redcarpet
+    ruby2_keywords (0.0.5)
     showoff (0.7.0)
       bluecloth
       gli (>= 1.3.2)
@@ -43,16 +46,17 @@ GEM
       nokogiri
       parslet
       sinatra
-    sinatra (1.3.2)
-      rack (~> 1.3, >= 1.3.6)
-      rack-protection (~> 1.2)
-      tilt (~> 1.3, >= 1.3.3)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
     syntax (1.0.0)
     thin (1.3.1)
       daemons (>= 1.0.9)
       eventmachine (>= 0.12.6)
       rack (>= 1.0.0)
-    tilt (1.3.3)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby