diff --git a/docker/Dockerfile b/docker/Dockerfile
index 6d47b4e..da51530 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:3.13.4
 
 EXPOSE 5353 8080
 
-ARG DYNDNSD_VERSION=3.3.3
+ARG DYNDNSD_VERSION=3.4.0
 
 RUN apk --no-cache add openssl ca-certificates && \
     apk --no-cache add ruby ruby-etc ruby-io-console ruby-json ruby-webrick && \
diff --git a/lib/dyndnsd/version.rb b/lib/dyndnsd/version.rb
index 2cafbd3..4bd17c9 100644
--- a/lib/dyndnsd/version.rb
+++ b/lib/dyndnsd/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Dyndnsd
-  VERSION = '3.3.3'
+  VERSION = '3.4.0'
 end