diff --git a/Dockerfile b/Dockerfile
index 3ba42006..b481d544 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,6 @@ RUN pip install -r requirements.txt
 
 COPY . .
 
-ENV PORT=8000
 EXPOSE 8000
 
 CMD ["python", "-m", "granian", "main:app", "--interface", "asgi", "--host", "0.0.0.0", "--port", "8000"]
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