diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72092f67013..3d32835d1f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -47,6 +47,8 @@ Warning: These experimental features are subject to change in future releases.
 
 ## MINOR CHANGES
 
+* `velocyto`: pin base container to `python:3.10-slim-bookworm` (PR #1063).
+
 * `mapping/cellranger_multi`: The output from Cell Ranger is now displayed as Cell Ranger is running (PR #1045).
 
 * Remove `workflows` directory (PR #993). The workflows which were at one point in this directory were all deprecated and moved to `src/workflows`.
diff --git a/src/velocity/velocyto/config.vsh.yaml b/src/velocity/velocyto/config.vsh.yaml
index cfd16aa9d71..66e562a80e0 100644
--- a/src/velocity/velocyto/config.vsh.yaml
+++ b/src/velocity/velocyto/config.vsh.yaml
@@ -54,7 +54,7 @@ test_resources:
 
 engines:
   - type: docker
-    image: python:3.10-slim
+    image: python:3.10-slim-bookworm
     setup:
       - type: apt
         packages: