diff --git a/libmproxy/web/__init__.py b/libmproxy/web/__init__.py
index 173ddf9f5..7016eeb8c 100644
--- a/libmproxy/web/__init__.py
+++ b/libmproxy/web/__init__.py
@@ -133,6 +133,9 @@ class WebMaster(flow.FlowMaster):
                     "Could not read flow file: %s"%v,
                     "error"
                 )
+        if self.options.app:
+            self.start_app(self.options.app_host, self.options.app_port)
+
 
     def tick(self):
         flow.FlowMaster.tick(self, self.masterq, timeout=0)
@@ -173,4 +176,4 @@ class WebMaster(flow.FlowMaster):
 
     def add_event(self, e, level="info"):
         super(WebMaster, self).add_event(e, level)
-        self.state.add_event(e, level)
\ No newline at end of file
+        self.state.add_event(e, level)