diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 8bdc638..4317521 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 5.0.0
+current_version = 5.1.0-dev
 tag = False
 commit = True
 message = EVMC {new_version}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c072557..56fda53 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,7 +24,7 @@ include(defaults/HunterCacheServers)
 include(HunterConfig)
 
 project(evmc)
-set(PROJECT_VERSION 5.0.0)
+set(PROJECT_VERSION 5.1.0-dev)
 
 cable_set_build_type(DEFAULT Release CONFIGURATION_TYPES Debug Release)