diff --git a/npm_install.py b/npm_install.py
index f61de42..a705409 100644
--- a/npm_install.py
+++ b/npm_install.py
@@ -240,7 +240,7 @@ def setup_certbot_venv(venv_dir: Path = Path("/opt/certbot")):
     # --- Debian pyenv
     PYENV_ROOT = Path("/opt/npm/.pyenv")
     PYENV_OWNER = "npm"
-    PYTHON_VERSION = "3.11.X"
+    PYTHON_VERSION = "3.11"
     PYENV_BIN_CANDIDATES = ["pyenv", "/usr/bin/pyenv", "/usr/lib/pyenv/bin/pyenv"]
 
     # --- Ubuntu: PPA deadsnakes + venv ---