diff --git a/docker/dockerfiles/joex.dockerfile b/docker/dockerfiles/joex.dockerfile
index 176cbea2..23dff9f3 100644
--- a/docker/dockerfiles/joex.dockerfile
+++ b/docker/dockerfiles/joex.dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:latest
+FROM alpine:3.14
 
 ARG version=
 ARG joex_url=
diff --git a/docker/dockerfiles/restserver.dockerfile b/docker/dockerfiles/restserver.dockerfile
index 1b0e59e4..d51cc4a8 100644
--- a/docker/dockerfiles/restserver.dockerfile
+++ b/docker/dockerfiles/restserver.dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:latest
+FROM alpine:3.14
 
 ARG version=
 ARG restserver_url=