diff --git a/dockerfiles/Dockerfile-for-frpc b/dockerfiles/Dockerfile-for-frpc
index ad3c81d..fce3d57 100644
--- a/dockerfiles/Dockerfile-for-frpc
+++ b/dockerfiles/Dockerfile-for-frpc
@@ -1,11 +1,11 @@
-FROM alpine:3.12.0 AS temp
+FROM alpine:3 AS temp
 
 COPY bin/frpc /tmp
 
 RUN chmod -R 777 /tmp/frpc
 
 
-FROM alpine:3.12.0
+FROM alpine:3
 
 WORKDIR /app
 
diff --git a/dockerfiles/Dockerfile-for-frps b/dockerfiles/Dockerfile-for-frps
index 7710804..3d65a9e 100644
--- a/dockerfiles/Dockerfile-for-frps
+++ b/dockerfiles/Dockerfile-for-frps
@@ -1,11 +1,11 @@
-FROM alpine:3.12.0 AS temp
+FROM alpine:3 AS temp
 
 COPY bin/frps /tmp
 
 RUN chmod -R 777 /tmp/frps
 
 
-FROM alpine:3.12.0
+FROM alpine:3
 
 WORKDIR /app