diff --git a/Cargo.toml b/Cargo.toml
index 9be7a4b..2282bc5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "routecore"
-version = "0.5.1"
+version = "0.5.2-dev"
 authors = ["NLnet Labs <routing-team@nlnetlabs.nl>"]
 categories = ["network-programming"]
 description = "A Library with Building Blocks for BGP Routing"
diff --git a/Changelog.md b/Changelog.md
index 17d318b..330d34c 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,22 @@
+## Unreleased new version
+
+
+Breaking changes
+
+
+Bug fixes
+
+
+New
+
+
+Other Changes
+
+
+Known limitations
+
+
+
 ## 0.5.1
 
 Released 2025-01-29.