diff --git a/Dockerfile b/Dockerfile
index 4cc688d..f3bb7dd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM lsiobase/alpine:3.8
+FROM lsiobase/alpine:3.9
 
 # set version label
 ARG BUILD_DATE
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index e5481b2..55d11b2 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -1,4 +1,4 @@
-FROM lsiobase/alpine:arm64v8-3.8
+FROM lsiobase/alpine:arm64v8-3.9
 
 # set version label
 ARG BUILD_DATE
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 2b095d7..dd1cbf0 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -1,4 +1,4 @@
-FROM lsiobase/alpine:arm32v7-3.8
+FROM lsiobase/alpine:arm32v7-3.9
 
 # set version label
 ARG BUILD_DATE
diff --git a/README.md b/README.md
index 393378d..32c363a 100644
--- a/README.md
+++ b/README.md
@@ -166,6 +166,7 @@ Below are the instructions for updating containers:
 
 ## Versions
 
+* **12.04.19:** - Rebase to Alpine 3.9.
 * **23.03.19:** - Switching to new Base images, shift to arm32v7 tag.
 * **11.03.19:** - Swap copyartifacts for extrafiles, update endpoints with nightly tag.
 * **01.03.19:** - Switch to python3.
diff --git a/readme-vars.yml b/readme-vars.yml
index b297915..7d7d188 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -39,6 +39,7 @@ param_ports:
 
 # changelog
 changelogs:
+  - { date: "12.04.19:", desc: "Rebase to Alpine 3.9." }
   - { date: "23.03.19:", desc: "Switching to new Base images, shift to arm32v7 tag." }
   - { date: "11.03.19:", desc: "Swap copyartifacts for extrafiles, update endpoints with nightly tag." }
   - { date: "01.03.19:", desc: "Switch to python3." }