diff --git a/runtime.txt b/runtime.txt
index 486fcce127f00eba90a4096290b67c31adaef0bd..0c89a2d2fcc8afa6b3b701fecccdbc6fb1b63c97 100644
--- a/runtime.txt
+++ b/runtime.txt
@@ -1 +1 @@
-python-3.6.5
+python-3.6.13