diff --git a/CHANGES.md b/CHANGES.md
index 38bbb5e..b00eeb1 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 # Changelog for BROStar API
 
+## 0.56 (unreleased)
+
+
+- Nothing changed yet.
+
+
 ## 0.55 (2024-11-04)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 6aeea26..24e3b1d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ description = "Simplify data management for BRO"
 authors = []
 license = {file = "LICENSE.txt"}
 readme = "README.md"
-version = "0.55"
+version = "0.56.dev0"
 
 [project.optional-dependencies]
 test = ["pytest"] # pytest added by nens-meta