diff --git a/Dockerfile--altlinux_10.tmpl b/Dockerfile--altlinux_10.tmpl
index 65129152..357fab97 100644
--- a/Dockerfile--altlinux_10.tmpl
+++ b/Dockerfile--altlinux_10.tmpl
@@ -1,5 +1,5 @@
 ARG PG_VERSION
-ARG PYTHON_VERSION 
+ARG PYTHON_VERSION=3
 
 # --------------------------------------------- base1
 FROM alt:p10 AS base1
diff --git a/Dockerfile--altlinux_11.tmpl b/Dockerfile--altlinux_11.tmpl
index faec0bfa..1ba48280 100644
--- a/Dockerfile--altlinux_11.tmpl
+++ b/Dockerfile--altlinux_11.tmpl
@@ -1,5 +1,5 @@
 ARG PG_VERSION
-ARG PYTHON_VERSION 
+ARG PYTHON_VERSION=3
 
 # --------------------------------------------- base1
 FROM alt:p11 AS base1
diff --git a/Dockerfile--astralinux_1_7.tmpl b/Dockerfile--astralinux_1_7.tmpl
index b8d6bc8f..2f02a3a9 100644
--- a/Dockerfile--astralinux_1_7.tmpl
+++ b/Dockerfile--astralinux_1_7.tmpl
@@ -1,5 +1,5 @@
 ARG PG_VERSION
-ARG PYTHON_VERSION 
+ARG PYTHON_VERSION=3
 
 # --------------------------------------------- base1
 FROM packpack/packpack:astra-1.7 AS base1
diff --git a/Dockerfile--std-all.tmpl b/Dockerfile--std-all.tmpl
index 44cce918..56e8a85f 100644
--- a/Dockerfile--std-all.tmpl
+++ b/Dockerfile--std-all.tmpl
@@ -1,5 +1,5 @@
 ARG PG_VERSION
-ARG PYTHON_VERSION 
+ARG PYTHON_VERSION=3
 
 # --------------------------------------------- base1
 FROM postgres:${PG_VERSION}-alpine AS base1
diff --git a/Dockerfile--std.tmpl b/Dockerfile--std.tmpl
index cb725863..5ff33ef9 100644
--- a/Dockerfile--std.tmpl
+++ b/Dockerfile--std.tmpl
@@ -1,5 +1,5 @@
 ARG PG_VERSION
-ARG PYTHON_VERSION 
+ARG PYTHON_VERSION=3
 
 # --------------------------------------------- base1
 FROM postgres:${PG_VERSION}-alpine AS base1
diff --git a/Dockerfile--std2-all.tmpl b/Dockerfile--std2-all.tmpl
index dcd061d9..f266027f 100644
--- a/Dockerfile--std2-all.tmpl
+++ b/Dockerfile--std2-all.tmpl
@@ -1,5 +1,5 @@
 ARG PG_VERSION
-ARG PYTHON_VERSION 
+ARG PYTHON_VERSION=3.12
 
 # --------------------------------------------- base1
 FROM postgres:${PG_VERSION}-alpine AS base1
diff --git a/Dockerfile--ubuntu_24_04.tmpl b/Dockerfile--ubuntu_24_04.tmpl
index 01c8c6ca..7136c2a1 100644
--- a/Dockerfile--ubuntu_24_04.tmpl
+++ b/Dockerfile--ubuntu_24_04.tmpl
@@ -1,5 +1,5 @@
 ARG PG_VERSION
-ARG PYTHON_VERSION 
+ARG PYTHON_VERSION=3
 
 # --------------------------------------------- base1
 FROM ubuntu:24.04 AS base1