diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 7610455..e61c7ca 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 6.2.1
+current_version = 6.3.0-dev
 tag = True
 sign_tags = True
 tag_message = EVMC {new_version}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 216915a..46fd3ff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,7 +34,7 @@ endif()
 cable_configure_toolchain(DEFAULT cxx11-pic)
 
 project(evmc)
-set(PROJECT_VERSION 6.2.1)
+set(PROJECT_VERSION 6.3.0-dev)
 
 cable_set_build_type(DEFAULT Release CONFIGURATION_TYPES Debug Release)
 
diff --git a/bindings/rust/evmc-sys/Cargo.toml b/bindings/rust/evmc-sys/Cargo.toml
index 8ef7791..b49e7e5 100644
--- a/bindings/rust/evmc-sys/Cargo.toml
+++ b/bindings/rust/evmc-sys/Cargo.toml
@@ -4,7 +4,7 @@
 
 [package]
 name = "evmc-sys"
-version = "6.2.1"
+version = "6.3.0-dev"
 authors = ["Alex Beregszaszi <alex@rtfs.hu>"]
 license = "Apache-2.0"
 repository = "https://github.com/ethereum/evmc"
diff --git a/bindings/rust/evmc-vm/Cargo.toml b/bindings/rust/evmc-vm/Cargo.toml
index c4d4e68..ea8dc34 100644
--- a/bindings/rust/evmc-vm/Cargo.toml
+++ b/bindings/rust/evmc-vm/Cargo.toml
@@ -4,7 +4,7 @@
 
 [package]
 name = "evmc-vm"
-version = "6.2.1"
+version = "6.3.0-dev"
 authors = ["Alex Beregszaszi <alex@rtfs.hu>"]
 license = "Apache-2.0"
 repository = "https://github.com/ethereum/evmc"