diff --git a/Dockerfile b/Dockerfile
index 4263cde..2535b1e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM lsiobase/alpine.python:3.8
+FROM lsiobase/alpine.python:3.9
 
 # set version label
 ARG BUILD_DATE
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 7545928..0ade56b 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -1,4 +1,4 @@
-FROM lsiobase/alpine.python.arm64:3.8
+FROM lsiobase/alpine.python.arm64:3.9
 
 # Add qemu to build on x86_64 systems
 COPY qemu-aarch64-static /usr/bin
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 5ec1361..fed8a6f 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -1,4 +1,4 @@
-FROM lsiobase/alpine.python.armhf:3.8
+FROM lsiobase/alpine.python.armhf:3.9
 
 # Add qemu to build on x86_64 systems
 COPY qemu-arm-static /usr/bin
diff --git a/readme-vars.yml b/readme-vars.yml
index 55aba98..1c292ae 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -79,6 +79,7 @@ app_setup_nginx_reverse_proxy_block: "Access WebUI at `<your-ip>:8181` and walk
 # changelog
 
 changelogs:
+  - { date: "22.02.19:", desc: "Rebasing to alpine 3.9." }
   - { date: "16.01.19:", desc: "Add pipeline logic and multi arch." }
   - { date: "18.08.18:", desc: "Rebase to alpine 3.8." }
   - { date: "03.04.18:", desc: "Remove forced port and update README." }