diff --git a/ultralytics/engine/exporter.py b/ultralytics/engine/exporter.py
index d5addaaf..d3873843 100644
--- a/ultralytics/engine/exporter.py
+++ b/ultralytics/engine/exporter.py
@@ -530,8 +530,9 @@ class Exporter:
             )
             system = "macos" if MACOS else "windows" if WINDOWS else "linux-aarch64" if ARM64 else "linux"
             try:
-                _, assets = get_github_assets(repo="pnnx/pnnx", retry=True)
+                _, assets = get_github_assets(repo="pnnx/pnnx")
                 url = [x for x in assets if f"{system}.zip" in x][0]
+                assert url, "Unable to retrieve PNNX repo assets"
             except Exception as e:
                 url = f"https://github.com/pnnx/pnnx/releases/download/20240410/pnnx-20240410-{system}.zip"
                 LOGGER.warning(f"{prefix} WARNING ⚠️ PNNX GitHub assets not found: {e}, using default {url}")