diff --git a/main.py b/main.py
index dea141e..027c7b9 100644
--- a/main.py
+++ b/main.py
@@ -30,7 +30,9 @@ async def fetch(url, tries=0):
 
 
 def join_url(a: str, b: str) -> str:
-    return a.rstrip("/") + "/" + b.lstrip("/")
+    if b.startswith("/"):
+        return a[: a.rfind(".") + a[a.rfind(".") :].find("/")] + b
+    return a.rstrip("/") + "/" + b
 
 
 async def traverse(pool: list[str], url: str, verbose=False) -> None: