diff --git a/flamenco_worker/upstream.py b/flamenco_worker/upstream.py
index 9759257327b56df420ed6608b60012d889bc9858..a9ac8ea7fe7a1767e9a26eed4396f7603b71dbf5 100644
--- a/flamenco_worker/upstream.py
+++ b/flamenco_worker/upstream.py
@@ -38,7 +38,7 @@ class FlamencoManager:
 
     @functools.lru_cache(1)
     def user_agent(self):
-        return 'Flamenco-Worker %s' % self.flamenco_worker_version
+        return 'Flamenco-Worker/%s' % self.flamenco_worker_version
 
     async def client_request(self, method, url, *,
                              params=None,