diff --git a/Dockerfile b/Dockerfile
index a321703d43addeaada6d236fb96ea9d129bc3325..57561dfc92099626f7de81d8ca93bd32df56b45e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:bookworm-slim
+FROM debian:bullseye-slim
 
 LABEL maintainer="elois <elois@duniter.org>"
 LABEL version="0.1.0"
@@ -6,7 +6,7 @@ LABEL description="Gitlab webhook to XMPP MUC bot"
 
 ENV DEBIAN_FRONTEND noninteractive
 RUN apt-get -y update && \
-    apt-get -y install libssl-dev
+    apt-get -y install libssl-dev libssl1.1
 
 
 RUN adduser --home /var/lib/gitbot gitbot