diff --git a/buildbot/worker/doc_api.py b/buildbot/worker/doc_api.py
index 69d5128..5a656db 100755
--- a/buildbot/worker/doc_api.py
+++ b/buildbot/worker/doc_api.py
@@ -63,7 +63,7 @@ def compile_doc(builder: DocApiBuilder) -> None:
     os.chdir(builder.track_path)
     doc_api_script_path = builder.code_path / "doc" / "python_api"
     worker.utils.call_pipenv(
-        ["install", "--requirements", doc_api_script_path / "requirements.txt"]
+        ["install", "--pre", "--requirements", doc_api_script_path / "requirements.txt"]
     )
 
     # Clean build directory