diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index b55e02b..52364f1 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 5.1.0
+current_version = 5.2.0-dev
 tag = False
 commit = True
 message = EVMC {new_version}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8eb5a49..d1ef6b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Changelog
 
+## [5.2.0-dev] - unreleased
+
 ## [5.1.0] - 2018-08-23
 
 - Feature: [[#41](https://github.com/ethereum/evmc/pull/41)]
@@ -39,5 +41,6 @@
   Constantinople: Storage status is reported back from `evmc_set_storage()`.
 
 
+[5.2.0-dev]: https://github.com/ethereum/evmc/compare/v5.1.0...HEAD
 [5.1.0]: https://github.com/ethereum/evmc/releases/tag/v5.1.0
 [5.0.0]: https://github.com/ethereum/evmc/releases/tag/v5.0.0
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b621b9d..df531ee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,7 +24,7 @@ include(defaults/HunterCacheServers)
 include(HunterConfig)
 
 project(evmc)
-set(PROJECT_VERSION 5.1.0)
+set(PROJECT_VERSION 5.2.0-dev)
 
 cable_set_build_type(DEFAULT Release CONFIGURATION_TYPES Debug Release)