diff --git a/Dockerfile b/Dockerfile
index cec23d3..ea070c2 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=9.20.4
-ARG BIND9_CHECKSUM=3a8e1a05e00e3e9bc02bdffded7862faf7726ba76ba997f42ab487777bd8210b
+ARG BIND9_VERSION=9.20.5
+ARG BIND9_CHECKSUM=19274fd739c023772b4212a0b6c201cf4364855fa7e6a7d3db49693f55db1ab8
 
 RUN apk --no-cache update
 RUN apk --no-cache upgrade