diff --git a/Dockerfile b/Dockerfile
index 85b0b96..01ed9c9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ghcr.io/bluesky/databroker:v2.0.0b38 as base
+FROM ghcr.io/bluesky/databroker:v2.0.0b40 as base
 
 # git is used only for the pip install git+https:// below and can be
 # removed once that is no longer used.