diff --git a/docs/management/commands/purge_docs_cache.py b/docs/management/commands/purge_docs_cache.py
index 3b6e0e327..d7a34cfe8 100644
--- a/docs/management/commands/purge_docs_cache.py
+++ b/docs/management/commands/purge_docs_cache.py
@@ -68,7 +68,7 @@ def purge_fastly(self, doc_versions):
         s = requests.Session()
         # make some allowance for temporary network failures for
         # our .post() request below
-        retry = Retry(total=5, method_whitelist={"POST"}, backoff_factor=0.1)
+        retry = Retry(total=5, allowed_methods={"POST"}, backoff_factor=0.1)
         s.mount(fastly_service_url, HTTPAdapter(max_retries=retry))
         s.headers.update(
             {