diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2146d27..82521e4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Test <abbr title="Portainer Stack Utils">PSU</abbr> with Portainer [1.24.0](https://app.swaggerhub.com/apis/deviantony/Portainer/1.24.0) API
 
+### Changed
+- Upgrade operating system of Docker based images, with [Alpine 3.12](https://hub.docker.com/_/alpine) and [Debian 10](https://hub.docker.com/_/debian)
+
 ### Removed
 - Test <abbr title="Portainer Stack Utils">PSU</abbr> with Portainer [1.21.0](https://app.swaggerhub.com/apis/deviantony/Portainer/1.21.0) API
 
diff --git a/Dockerfile b/Dockerfile
index 9535047..c1cd163 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.10
+FROM alpine:3.12
 
 RUN apk add --no-cache \
       bash ca-certificates gettext jq \
diff --git a/Dockerfile.core b/Dockerfile.core
index 1f8c57d..9515ce2 100644
--- a/Dockerfile.core
+++ b/Dockerfile.core
@@ -1,4 +1,4 @@
-FROM alpine:3.10
+FROM alpine:3.12
 
 RUN apk add --no-cache \
       bash ca-certificates gettext httpie jq
diff --git a/Dockerfile.debian b/Dockerfile.debian
index a616d39..bd8c2d9 100644
--- a/Dockerfile.debian
+++ b/Dockerfile.debian
@@ -1,4 +1,4 @@
-FROM debian:9-slim
+FROM debian:10-slim
 
 RUN apt-get update -yqq; \
     apt-get install \
diff --git a/Dockerfile.debian-core b/Dockerfile.debian-core
index d05d1cf..1cd1caf 100644
--- a/Dockerfile.debian-core
+++ b/Dockerfile.debian-core
@@ -1,4 +1,4 @@
-FROM debian:9-slim
+FROM debian:10-slim
 
 RUN apt-get update -yqq; \
     apt-get install \