diff --git a/runtime.txt b/runtime.txt
index a48890ea3ee0e8f2e83e3eb85a2953223a6e2bb2..6934f40b1f211c9303c2de50fc63d7650e520f63 100644
--- a/runtime.txt
+++ b/runtime.txt
@@ -1 +1 @@
-python-3.8.10
+python-3.8.9