diff --git a/Dockerfile b/Dockerfile
index e0b5d52..01ef6bf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,8 +8,8 @@ ENV RUNTIME_DEPS bash util-linux coreutils findutils grep libressl ldns ldns-too
 RUN set -x && \
     apk --update upgrade && apk add $RUNTIME_DEPS $BUILD_DEPS
 
-ENV UNBOUND_VERSION 1.6.2
-ENV UNBOUND_SHA256 1a323d72c32180b7141c9e6ebf199fc68a0208dfebad4640cd2c4c27235e3b9c
+ENV UNBOUND_VERSION 1.6.3
+ENV UNBOUND_SHA256 4c7e655c1d0d2d133fdeb81bc1ab3aa5c155700f66c9f5fb53fa6a5c3ea9845f
 ENV UNBOUND_DOWNLOAD_URL https://www.unbound.net/downloads/unbound-${UNBOUND_VERSION}.tar.gz
 
 RUN set -x && \