diff --git a/Dockerfile b/Dockerfile
index c4120ea..c8d1846 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=9.20.5
-ARG BIND9_CHECKSUM=19274fd739c023772b4212a0b6c201cf4364855fa7e6a7d3db49693f55db1ab8
+ARG BIND9_VERSION=9.20.6
+ARG BIND9_CHECKSUM=ed7f54b44f84a7201a2fa7a949f3021ea568529bfad90fca664fd55c05104134
 
 RUN apk --no-cache update
 RUN apk --no-cache upgrade