diff --git a/apps/concourse-git-semver-tag-resource/Dockerfile b/apps/concourse-git-semver-tag-resource/Dockerfile
index 6f6a2ff1d0..fc0385db3e 100644
--- a/apps/concourse-git-semver-tag-resource/Dockerfile
+++ b/apps/concourse-git-semver-tag-resource/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.19.0
+FROM alpine:3.20.3
 
 RUN apk --update add \
   ca-certificates \
diff --git a/apps/concourse-github-pr-resource/Dockerfile b/apps/concourse-github-pr-resource/Dockerfile
index f84d755cf8..7f8726ba53 100644
--- a/apps/concourse-github-pr-resource/Dockerfile
+++ b/apps/concourse-github-pr-resource/Dockerfile
@@ -1,7 +1,7 @@
 ARG GOOS=linux
 ARG GOARCH=amd64
 
-FROM alpine:3.19.0 as resource-tools
+FROM alpine:3.20.3 as resource-tools
 RUN apk add --update --no-cache \
     curl \
     jq \
diff --git a/apps/concourse-slack-notification-resource/Dockerfile b/apps/concourse-slack-notification-resource/Dockerfile
index d1e50f032d..3c587cc407 100644
--- a/apps/concourse-slack-notification-resource/Dockerfile
+++ b/apps/concourse-slack-notification-resource/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.19.0
+FROM alpine:3.20.3
 
 ARG VERSION
 ARG BUILD_DATE
diff --git a/apps/petio/Dockerfile b/apps/petio/Dockerfile
index c641d2b12b..5803a1b315 100644
--- a/apps/petio/Dockerfile
+++ b/apps/petio/Dockerfile
@@ -40,7 +40,7 @@ RUN mv /build/frontend/build /build/views/frontend && \
     rm -rf /build/admin && \
     chmod -R u=rwX,go=rX /build
 
-FROM alpine:3.13
+FROM alpine:3.20
 
 EXPOSE 7777
 VOLUME ["/app/api/config", "/app/logs"]
diff --git a/apps/zyclops/Dockerfile b/apps/zyclops/Dockerfile
index 1ddce755dd..f4034b43f0 100644
--- a/apps/zyclops/Dockerfile
+++ b/apps/zyclops/Dockerfile
@@ -18,7 +18,7 @@ RUN go mod download
 RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-w -s" -o zyclops ./cmd/zyclops
 
 # Final stage
-FROM alpine:3.18
+FROM alpine:3.20
 
 WORKDIR /app
 COPY --from=builder /app/zyclops .