diff --git a/app.js b/app.js
index aee614d2..225f8e64 100755
--- a/app.js
+++ b/app.js
@@ -45,3 +45,7 @@ ws.listen(global.environment.port, global.environment.host);
 ws.on('listening', function() {
   console.log("Windshaft tileserver started on " + global.environment.host + ':' + global.environment.port);
 });
+
+process.on('SIGUSR1', function() {
+  ws.dumpCacheStats();
+});
diff --git a/cluster.js b/cluster.js
index 74f7361a..24866a06 100755
--- a/cluster.js
+++ b/cluster.js
@@ -57,3 +57,6 @@ cluster.listen(function(cb) {
   console.log("Windshaft tileserver started on port " + global.environment.port);
 });
 
+process.on('SIGUSR1', function() {
+  ws.dumpCacheStats();
+});
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 9a832d3c..733a29dc 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -254,7 +254,7 @@
       }
     },
     "windshaft": {
-      "version": "0.8.3",
+      "version": "0.8.4",
       "dependencies": {
         "express": {
           "version": "2.5.11",
diff --git a/package.json b/package.json
index 7eadf430..8b5c2b85 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
         "node-varnish": "0.1.1",
         "underscore"  : "~1.3.3",
         "grainstore"  : "~0.10.10",
-        "windshaft"  : "~0.8.3",
+        "windshaft"  : "~0.8.4",
         "step": "0.0.x",
         "generic-pool": "1.0.x",
         "redis": "0.7.2",