diff --git a/backend/app/services/video_renderer.py b/backend/app/services/video_renderer.py
index 51cdab6..188207d 100644
--- a/backend/app/services/video_renderer.py
+++ b/backend/app/services/video_renderer.py
@@ -50,6 +50,7 @@ class VideoRendererService:
         Raises:
             FFmpegExecutionError: If the command fails
         """
+        from celery.result import allow_join_result
         from ..tasks.ffmpeg_operations import run_ffmpeg_command
 
         # Dispatch to ffmpeg queue
@@ -62,8 +63,10 @@ class VideoRendererService:
         while not task_result.ready():
             await asyncio.sleep(0.5)
 
-        # Get result (should be ready, short timeout for safety)
-        result = task_result.get(timeout=30)
+        # Get result - use allow_join_result since we're calling from within a task
+        # This is safe because we've already confirmed the task is complete via ready()
+        with allow_join_result():
+            result = task_result.get(timeout=30)
 
         if not result['success']:
             raise FFmpegExecutionError(
@@ -85,6 +88,7 @@ class VideoRendererService:
         Raises:
             FFmpegExecutionError: If the command fails
         """
+        from celery.result import allow_join_result
         from ..tasks.ffmpeg_operations import run_ffprobe_command
 
         # Dispatch to ffmpeg queue
@@ -97,8 +101,10 @@ class VideoRendererService:
         while not task_result.ready():
             await asyncio.sleep(0.2)
 
-        # Get result
-        result = task_result.get(timeout=30)
+        # Get result - use allow_join_result since we're calling from within a task
+        # This is safe because we've already confirmed the task is complete via ready()
+        with allow_join_result():
+            result = task_result.get(timeout=30)
 
         if not result['success']:
             raise FFmpegExecutionError(