diff --git a/deployment/Dockerfile b/deployment/Dockerfile
index 89daab2..387fa70 100644
--- a/deployment/Dockerfile
+++ b/deployment/Dockerfile
@@ -6,7 +6,7 @@ RUN mkdir -p /root/go/src
 COPY dyndns /root/go/src/dyndns
 RUN cd /root/go/src/dyndns && go mod download && GOOS=linux go build -o /root/go/bin/dyndns && go test -v
 
-FROM debian:buster-slim
+FROM debian:bullseye-slim
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
 	apt-get install -q -y bind9 dnsutils curl && \