diff --git a/pyproject.toml b/pyproject.toml
index 25f5167..b9e475c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "mbari-pbp"
-version = "0.3.0b3"
+version = "0.3.0b4"
 # for now, pbp version "aligned" (not necessarily exactly) with that of lifewatch-pypam.
 description = "PyPAM based Processing"
 authors = [