diff --git a/CHANGELOG.md b/CHANGELOG.md
index b984646..e9e930e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## 3.3.1
+## 3.3.1 (February 18, 2021)
 
 OTHER:
 
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 9098e3b..742620a 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:3.13.2
 
 EXPOSE 5353 8080
 
-ARG DYNDNSD_VERSION=3.3.0
+ARG DYNDNSD_VERSION=3.3.1
 
 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 511161f..a919410 100644
--- a/lib/dyndnsd/version.rb
+++ b/lib/dyndnsd/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Dyndnsd
-  VERSION = '3.3.0'
+  VERSION = '3.3.1'
 end