diff --git a/Dockerfile b/Dockerfile
index d05fdb0..0e26809 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ RUN wget https://github.com/fatedier/frp/releases/download/v${FRP_VERSION}/frp_$
 RUN tar zxvf frp_${FRP_VERSION}_${MACHINE}.tar.gz
 RUN mv frp_${FRP_VERSION}_${MACHINE} /frpc
 RUN rm frp_${FRP_VERSION}_${MACHINE}.tar.gz
-ENV TZ=Asia/Shanghai
+ENV TZ Asia/Shanghai
 RUN mkdir /conf
 VOLUME /conf
 WORKDIR /frpc