diff --git a/grandlyon_cartads_cs/models.py b/grandlyon_cartads_cs/models.py
index baffd6c..49bae33 100644
--- a/grandlyon_cartads_cs/models.py
+++ b/grandlyon_cartads_cs/models.py
@@ -94,7 +94,11 @@ class GLCartaDSCS(AbstractCartaDSCS):
         # to DoS the server.
         # -- https://bz.apache.org/bugzilla/show_bug.cgi?id=39243
         # and that's why there's a seemingly unnecessary GET request first.
-        self.requests.get(self.sendfile_ws_url)
+        api_manager_token = self.resource.get_api_manager_token()
+        response = self.requests.get(self.sendfile_ws_url,
+                headers={'Authorization': api_manager_token})
+        if response.status_code == 401:
+            api_manager_token = self.resource.get_api_manager_token(renew=True)
         b64_zip = base64.b64encode(open(zip_filename, 'rb').read())
         chunk_size = 16777216  # 16MB
         for n in range(0, len(b64_zip), chunk_size):
@@ -102,7 +106,8 @@ class GLCartaDSCS(AbstractCartaDSCS):
                     data={
                         'fileName': self.sendfile_ws_dirname + os.path.basename(zip_filename),
                         'b64_fileContent': b64_zip[n:n+chunk_size].decode('ascii'),
-                    }
+                    },
+                    headers={'Authorization': api_manager_token}
                     )
             resp.raise_for_status()
             if resp.content: