diff --git a/prometheus_ss_exporter/__init__.py b/prometheus_ss_exporter/__init__.py
index f9fdb78..10a0a0b 100755
--- a/prometheus_ss_exporter/__init__.py
+++ b/prometheus_ss_exporter/__init__.py
@@ -63,10 +63,9 @@ def collect(self):
 
 
 class health_check(Resource):
-    isLeaf = True
 
     def render_GET(self, request):
-        return "200 OK"
+        return "200 OK".encode("utf-8")
 
 
 def setup_args():
@@ -111,7 +110,7 @@ def main():
 
         root = Resource()
         root.putChild(b'metrics', MetricsResource(registry=REGISTRY))
-        root.putChild(b'health', health_check)
+        root.putChild(b'health', health_check())
 
         factory = Site(root)
         reactor.listenTCP(port, factory)