diff --git a/cic/writers.py b/cic/writers.py
index acaef20..49b2865 100644
--- a/cic/writers.py
+++ b/cic/writers.py
@@ -52,7 +52,7 @@ class HTTPWriter(OutputWriter):
         path = self.path
         if k is not None:
             path = os.path.join(path, k)
-        logg.debug(f"http writer post {path} \n key: {k}, value: {v}")
+        logg.debug(f"HTTPWriter POST {path} data: {v}, headers: {self.headers}")
         rq = urllib.request.Request(path, method="POST", data=v, headers=self.headers)
         r = urllib.request.urlopen(rq)
         logg.info(f"http writer submitted at {r.read()}")
@@ -85,13 +85,15 @@ class KeyedWriterFactory:
             logg.debug(f"adding key {k} t keyed writer factory")
             self.x[k] = v
 
-    def new(self, path=None, *_args, **_kwargs):
+    def new(self, path=None, headers: Dict[str, str] = None, *_args, **_kwargs):
         writer_keyed = None
         writer_immutable = None
         if self.key_writer_constructor is not None:
             writer_keyed = self.key_writer_constructor(path, **self.x)
         if self.immutable_writer_constructor is not None:
-            writer_immutable = self.immutable_writer_constructor(path, **self.x)
+            writer_immutable = self.immutable_writer_constructor(
+                path, headers, **self.x
+            )
         return KeyedWriter(writer_keyed, writer_immutable)