diff --git a/Dockerfile b/Dockerfile
index f30772afd9203..973d93b784cca 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,7 +23,7 @@ RUN if [ -n "${GITEA_VERSION}" ]; then git checkout "${GITEA_VERSION}"; fi \
 # Begin env-to-ini build
 RUN go build contrib/environment-to-ini/environment-to-ini.go
 
-FROM alpine:3.13
+FROM alpine:3.15
 LABEL maintainer="maintainers@gitea.io"
 
 EXPOSE 22 3000
diff --git a/Dockerfile.rootless b/Dockerfile.rootless
index a247f735f1e1b..27e898c58e46c 100644
--- a/Dockerfile.rootless
+++ b/Dockerfile.rootless
@@ -23,7 +23,7 @@ RUN if [ -n "${GITEA_VERSION}" ]; then git checkout "${GITEA_VERSION}"; fi \
 # Begin env-to-ini build
 RUN go build contrib/environment-to-ini/environment-to-ini.go
 
-FROM alpine:3.13
+FROM alpine:3.15
 LABEL maintainer="maintainers@gitea.io"
 
 EXPOSE 2222 3000