diff --git a/docker/witnesses/Dockerfile b/docker/witnesses/Dockerfile
index b13ccd9..adc96c3 100644
--- a/docker/witnesses/Dockerfile
+++ b/docker/witnesses/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.6.2-slim
+FROM python:3.14.0rc1-slim
 
 RUN apt-get update && \
     apt-get install -y git make gcc libssl-dev libgmp-dev python-dev libxml2-dev libxslt1-dev zlib1g-dev