diff --git a/implementations/python-jschon/Dockerfile b/implementations/python-jschon/Dockerfile
index c86f467c7..46c347a6d 100644
--- a/implementations/python-jschon/Dockerfile
+++ b/implementations/python-jschon/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.15.0b2-alpine
+FROM python:3.15.0b3-alpine
 WORKDIR /usr/src/myapp
 RUN python3 -m pip install jschon
 COPY bowtie_jschon.py .