diff --git a/asn-updater/update.py b/asn-updater/update.py
index c2fb954..301ba91 100644
--- a/asn-updater/update.py
+++ b/asn-updater/update.py
@@ -81,7 +81,7 @@ def update_nren_asns() -> None:
         time.sleep(1.1)  # sehr konservativ
 
     out_txt = os.path.join(OUT_DIR, "nren_asns.txt")
-    with tempfile.NamedTemporaryFile("w", delete=False) as f:
+    with tempfile.NamedTemporaryFile("w", delete=False, dir=OUT_DIR) as f:
         for a in sorted(asns):
             f.write(f"{a}\n")
         tmp_path = f.name