diff --git a/src/aeros_simulation/service.py b/src/aeros_simulation/service.py
index 918a26a..7f467d4 100644
--- a/src/aeros_simulation/service.py
+++ b/src/aeros_simulation/service.py
@@ -37,7 +37,7 @@ active_simulations = {}
 
 async def call_ahm_callback_service(simulation_id: str, job_id: str):
     from src.config import AHM_BASE_URL, AHM_SIMULATION_CALLBACK_URL
-    url = f"{AHM_BASE_URL}{AHM_SIMULATION_CALLBACK_URL}"
+    url = f"{AHM_BASE_URL.rstrip('/')}/{AHM_SIMULATION_CALLBACK_URL.lstrip('/')}"
     payload = {
         "simulation_id": simulation_id,
         "job_id": job_id,