diff --git a/dockerfiles/Dockerfile-for-frpc b/dockerfiles/Dockerfile-for-frpc
index bc137320..ad3c81dc 100644
--- a/dockerfiles/Dockerfile-for-frpc
+++ b/dockerfiles/Dockerfile-for-frpc
@@ -1,6 +1,6 @@
 FROM alpine:3.12.0 AS temp
 
-ADD bin/frpc /tmp
+COPY bin/frpc /tmp
 
 RUN chmod -R 777 /tmp/frpc
 
diff --git a/dockerfiles/Dockerfile-for-frps b/dockerfiles/Dockerfile-for-frps
index 4913079b..77108041 100644
--- a/dockerfiles/Dockerfile-for-frps
+++ b/dockerfiles/Dockerfile-for-frps
@@ -1,6 +1,6 @@
 FROM alpine:3.12.0 AS temp
 
-ADD bin/frps /tmp
+COPY bin/frps /tmp
 
 RUN chmod -R 777 /tmp/frps