diff --git a/.buildkite/check-wheel-size.py b/.buildkite/check-wheel-size.py
index 0412c5f37952d..105d0b9e77a44 100644
--- a/.buildkite/check-wheel-size.py
+++ b/.buildkite/check-wheel-size.py
@@ -2,8 +2,10 @@
 import sys
 import zipfile
 
-# Read the VLLM_MAX_SIZE_MB environment variable, defaulting to 250 MB
-VLLM_MAX_SIZE_MB = int(os.environ.get('VLLM_MAX_SIZE_MB', 250))
+# Read the VLLM_MAX_SIZE_MB environment variable, defaulting to 300 MiB
+# Note that we have 400 MiB quota, please use it wisely.
+# See https://github.com/pypi/support/issues/3792 .
+VLLM_MAX_SIZE_MB = int(os.environ.get('VLLM_MAX_SIZE_MB', 300))
 
 
 def print_top_10_largest_files(zip_file):