diff --git a/2.10/alpine/Dockerfile b/2.10/alpine/Dockerfile
index 044ea3a..0105d95 100644
--- a/2.10/alpine/Dockerfile
+++ b/2.10/alpine/Dockerfile
@@ -13,6 +13,7 @@ RUN set -eux; \
 		/etc/caddy \
 		/usr/share/caddy \
 	; \
+	chmod 1777 /config/caddy /data/caddy; \
 	wget -O /etc/caddy/Caddyfile "https://github.com/caddyserver/dist/raw/33ae08ff08d168572df2956ed14fbc4949880d94/config/Caddyfile"; \
 	wget -O /usr/share/caddy/index.html "https://github.com/caddyserver/dist/raw/33ae08ff08d168572df2956ed14fbc4949880d94/welcome/index.html"
 
diff --git a/2.11/alpine/Dockerfile b/2.11/alpine/Dockerfile
index 2b2a055..394fba8 100644
--- a/2.11/alpine/Dockerfile
+++ b/2.11/alpine/Dockerfile
@@ -13,6 +13,7 @@ RUN set -eux; \
 		/etc/caddy \
 		/usr/share/caddy \
 	; \
+	chmod 1777 /config/caddy /data/caddy; \
 	wget -O /etc/caddy/Caddyfile "https://github.com/caddyserver/dist/raw/33ae08ff08d168572df2956ed14fbc4949880d94/config/Caddyfile"; \
 	wget -O /usr/share/caddy/index.html "https://github.com/caddyserver/dist/raw/33ae08ff08d168572df2956ed14fbc4949880d94/welcome/index.html"
 
diff --git a/Dockerfile.tmpl b/Dockerfile.tmpl
index e2f40fc..9bd642a 100644
--- a/Dockerfile.tmpl
+++ b/Dockerfile.tmpl
@@ -13,6 +13,7 @@ RUN set -eux; \
 		/etc/caddy \
 		/usr/share/caddy \
 	; \
+	chmod 1777 /config/caddy /data/caddy; \
 	wget -O /etc/caddy/Caddyfile "https://github.com/caddyserver/dist/raw/{{ .config.dist_commit }}/config/Caddyfile"; \
 	wget -O /usr/share/caddy/index.html "https://github.com/caddyserver/dist/raw/{{ .config.dist_commit }}/welcome/index.html"