diff --git a/docker/Dockerfile.linux.amd64 b/docker/Dockerfile.linux.amd64
index dc2981f..17107bc 100644
--- a/docker/Dockerfile.linux.amd64
+++ b/docker/Dockerfile.linux.amd64
@@ -8,5 +8,6 @@ LABEL maintainer="Bo-Yi Wu <appleboy.tw@gmail.com>" \
 RUN apk add --no-cache ca-certificates && \
   rm -rf /var/cache/apk/*
 
-ADD release/linux/amd64/drone-ssh /bin/
+COPY release/linux/amd64/drone-ssh /bin/
+
 ENTRYPOINT ["/bin/drone-ssh"]
diff --git a/docker/Dockerfile.linux.arm b/docker/Dockerfile.linux.arm
index eb8805d..019c71b 100644
--- a/docker/Dockerfile.linux.arm
+++ b/docker/Dockerfile.linux.arm
@@ -8,5 +8,6 @@ LABEL maintainer="Bo-Yi Wu <appleboy.tw@gmail.com>" \
 RUN apk add --no-cache ca-certificates && \
   rm -rf /var/cache/apk/*
 
-ADD release/linux/arm/drone-ssh /bin/
+COPY release/linux/arm/drone-ssh /bin/
+
 ENTRYPOINT ["/bin/drone-ssh"]
diff --git a/docker/Dockerfile.linux.arm64 b/docker/Dockerfile.linux.arm64
index 2a32848..14bc3d1 100644
--- a/docker/Dockerfile.linux.arm64
+++ b/docker/Dockerfile.linux.arm64
@@ -8,5 +8,6 @@ LABEL maintainer="Bo-Yi Wu <appleboy.tw@gmail.com>" \
 RUN apk add --no-cache ca-certificates && \
   rm -rf /var/cache/apk/*
 
-ADD release/linux/arm64/drone-ssh /bin/
+COPY release/linux/arm64/drone-ssh /bin/
+
 ENTRYPOINT ["/bin/drone-ssh"]