diff --git a/docker/Dockerfile b/docker/Dockerfile
index 21b54e9..499f28a 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.14.0
+FROM alpine:3.13.5
 
 EXPOSE 5353 8080
 
diff --git a/docker/ci/Dockerfile b/docker/ci/Dockerfile
index 31ad975..e60a72c 100644
--- a/docker/ci/Dockerfile
+++ b/docker/ci/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.14.0
+FROM alpine:3.13.5
 
 EXPOSE 5353 8080