diff --git a/lib/output/base.js b/lib/output/base.js
index 6662443fe..491db9587 100644
--- a/lib/output/base.js
+++ b/lib/output/base.js
@@ -59,6 +59,14 @@ Output.prototype.generate = function() {
         });
     })
 
+    // Transform the configuration
+    .then(function() {
+        return that.plugins.hook('config', that.book.config.dump())
+        .then(function(cfg) {
+            that.book.config.replace(cfg);
+        });
+    })
+
     // Initialize the generation
     .then(function() {
         that.log.info.ln('preparing the generation');