diff --git a/.drone.yml b/.drone.yml
index 4116b6a..e064de6 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -15,7 +15,7 @@ trigger:
 
 steps:
   - name: install-lint-test
-    image: python:3.9.21-alpine@sha256:f2f6a5627a879693b8c23e04df0b1a6aae3e09c165fa2a08f5c64b2b54c58d3c
+    image: python:3.13.1-alpine@sha256:4ecc1be699f33ab3051ae8ec9532a77d1bf075739b1269b253cf3906a922f74e
     env:
       PYROOT: '/pyroot'
       PYTHONUSERBASE: '/pyroot'
@@ -104,7 +104,7 @@ trigger:
 
 steps:
   - name: install-lint-test
-    image: python:3.9.21-alpine@sha256:f2f6a5627a879693b8c23e04df0b1a6aae3e09c165fa2a08f5c64b2b54c58d3c
+    image: python:3.13.1-alpine@sha256:4ecc1be699f33ab3051ae8ec9532a77d1bf075739b1269b253cf3906a922f74e
     env:
       PYROOT: '/pyroot'
       PYTHONUSERBASE: '/pyroot'
diff --git a/.python-version b/.python-version
index 843a60c..c10780c 100644
--- a/.python-version
+++ b/.python-version
@@ -1 +1 @@
-3.9.21
+3.13.1
diff --git a/Dockerfile b/Dockerfile
index c85a565..9cad5a8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-FROM python:3.9.21-alpine@sha256:f2f6a5627a879693b8c23e04df0b1a6aae3e09c165fa2a08f5c64b2b54c58d3c AS builder
+FROM python:3.13.1-alpine@sha256:4ecc1be699f33ab3051ae8ec9532a77d1bf075739b1269b253cf3906a922f74e AS builder
 
 ENV PYROOT=/pyroot
 ENV PYTHONUSERBASE=$PYROOT
@@ -20,7 +20,7 @@ RUN PIP_USER=1 PIP_IGNORE_INSTALLED=1 pipenv install --system --deploy --ignore-
 RUN pip3 uninstall --yes pipenv
 
 
-FROM python:3.9.21-alpine@sha256:f2f6a5627a879693b8c23e04df0b1a6aae3e09c165fa2a08f5c64b2b54c58d3c AS ki-backend
+FROM python:3.13.1-alpine@sha256:4ecc1be699f33ab3051ae8ec9532a77d1bf075739b1269b253cf3906a922f74e AS ki-backend
 
 ENV PYROOT=/pyroot
 ENV PYTHONUSERBASE=$PYROOT