diff --git a/Dockerfile b/Dockerfile
index 1756b21..5877602 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,8 +4,8 @@ MAINTAINER BIND 9 Developers <bind9-dev@isc.org>
 ENV DEBIAN_FRONTEND noninteractive
 ENV LC_ALL C.UTF-8
 
-ARG BIND9_VERSION=9.21.1
-ARG BIND9_CHECKSUM=d17b641c7e64991ec1842f3e40609ef43c336abc2b42749865e2be7db260c19b
+ARG BIND9_VERSION=9.21.2
+ARG BIND9_CHECKSUM=3233fbc9f3b45da5348a79a192e00712e0e16ba0167894b55ffacdafbe98efcb
 
 RUN apk --no-cache update
 RUN apk --no-cache upgrade