diff --git a/infra/dockerfile.base b/infra/dockerfile.base
index 3a6c19ae7b..00ef34cbea 100644
--- a/infra/dockerfile.base
+++ b/infra/dockerfile.base
@@ -1,4 +1,4 @@
-FROM python:3.14.6-slim
+FROM python:3.15.0b3-slim
 
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
 
diff --git a/infra/dockerfile.spawn_pipeline b/infra/dockerfile.spawn_pipeline
index 2511d78aa6..2751795ce8 100644
--- a/infra/dockerfile.spawn_pipeline
+++ b/infra/dockerfile.spawn_pipeline
@@ -1,4 +1,4 @@
-FROM python:3.14.6-slim
+FROM python:3.15.0b3-slim
 
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/