diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 2be9c43..0ee8c01 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.2.0"
+  ".": "0.3.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0ff9bba..27d0148 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,16 @@
 # Changelog
 
+## [0.3.0](https://github.com/copick/copick-cpp/compare/v0.2.0...v0.3.0) (2026-10-08)
+
+
+### ⚠ BREAKING CHANGES
+
+* Point::instance_id changes from int to std::int64_t, which changes the layout of Point and the ABI. Consumers (AreTomo3) rebuild; code that assigns an int keeps compiling.
+
+### Features
+
+* 64-bit instance ids and filament spec accessor ([#2](https://github.com/copick/copick-cpp/issues/2)) ([98a7cd7](https://github.com/copick/copick-cpp/commit/98a7cd7c9b00919e50fe54438c00c6b44c6b4def))
+
 ## [0.2.0](https://github.com/copick/copick-cpp/compare/v0.1.0...v0.2.0) (2026-07-15)
 
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ff76c3f..1e1754b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.24)  # tensorstore requires >= 3.24
-project(copick_cpp VERSION 0.2.0 LANGUAGES CXX)  # x-release-please-version
+project(copick_cpp VERSION 0.3.0 LANGUAGES CXX)  # x-release-please-version
 
 # --- Options ------------------------------------------------------------------
 option(COPICK_BUILD_TESTS "Build the C++ test suite" ON)
diff --git a/include/copick/version.h b/include/copick/version.h
index 3bc461d..4902499 100644
--- a/include/copick/version.h
+++ b/include/copick/version.h
@@ -10,9 +10,9 @@
 
 // Version numbers are maintained by release-please (do not edit the values by hand).
 #define COPICK_VERSION_MAJOR 0         // x-release-please-major
-#define COPICK_VERSION_MINOR 2         // x-release-please-minor
+#define COPICK_VERSION_MINOR 3         // x-release-please-minor
 #define COPICK_VERSION_PATCH 0         // x-release-please-patch
-#define COPICK_VERSION_STRING "0.2.0"  // x-release-please-version
+#define COPICK_VERSION_STRING "0.3.0"  // x-release-please-version
 
 namespace copick {
 
diff --git a/version.txt b/version.txt
index 0ea3a94..0d91a54 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.2.0
+0.3.0