diff --git a/Dockerfile b/Dockerfile
index 2b6e6362..8471cf41 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -57,8 +57,7 @@ RUN apk add --no-cache \
     ca-certificates \
     tzdata \
     nftables \
-    iproute2 \
-    dcron
+    iproute2
 
 RUN ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime && \
     echo "${TZ}" > /etc/timezone
diff --git a/docker/README.md b/docker/README.md
index 2bb586dc..c3daaa64 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -57,6 +57,7 @@ docker run -d \
   --cap-add NET_ADMIN \
   --cap-add NET_RAW \
   --cap-add SYS_ADMIN \
+  --sysctl net.ipv4.ip_forward=1 \
   --device /dev/net/tun:/dev/net/tun \
   --restart unless-stopped \
   juewuy/shellcrash:latest
diff --git a/docker/compose.yml b/docker/compose.yml
index 8c59972a..d246815b 100644
--- a/docker/compose.yml
+++ b/docker/compose.yml
@@ -14,7 +14,8 @@ services:
     devices:
       - "/dev/net/tun:/dev/net/tun"
     sysctls:
-      net.ipv4.ip_forward: 1
+      - net.ipv4.ip_forward: 1
+      # - net.ipv6.conf.all.forwarding=1
     volumes:
       - shellcrash_configs:/etc/ShellCrash/configs:rw
     restart: unless-stopped