diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7477939..df0d2dd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## Unreleased
 
+## 0.4.0-dev.1 - 2026-10-30
+
 ### Breaking Changes
 
 - **MCP TypeScript SDK v2 (#46, same move as mapbox/mcp-server#296).** The server and the `/tools`, `/resources` and `/utils` exports now use `@modelcontextprotocol/server` 2.4.0 instead of `@modelcontextprotocol/sdk` 1.x. v2 is where new MCP features land.
diff --git a/manifest.json b/manifest.json
index 6b46ae8..f9d16f9 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,7 +2,7 @@
   "dxt_version": "0.1",
   "display_name": "Mapbox MCP Docs Server",
   "name": "@mapbox/mcp-docs-server",
-  "version": "0.3.1",
+  "version": "0.4.0-dev.1",
   "description": "Mapbox documentation server.",
   "author": {
     "name": "Mapbox, Inc."
diff --git a/package-lock.json b/package-lock.json
index 187fe61..110b425 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@mapbox/mcp-docs-server",
-  "version": "0.3.1",
+  "version": "0.4.0-dev.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@mapbox/mcp-docs-server",
-      "version": "0.3.1",
+      "version": "0.4.0-dev.1",
       "license": "MIT",
       "dependencies": {
         "@modelcontextprotocol/server": "^2.4.0",
diff --git a/package.json b/package.json
index 0fee434..3b75252 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mapbox/mcp-docs-server",
-  "version": "0.3.1",
+  "version": "0.4.0-dev.1",
   "description": "Mapbox MCP documentation server",
   "mcpName": "io.github.mapbox/mcp-docs-server",
   "main": "./dist/commonjs/index.js",
diff --git a/server.json b/server.json
index 1cf0caf..c3c24f6 100644
--- a/server.json
+++ b/server.json
@@ -6,13 +6,13 @@
     "url": "https://github.com/mapbox/mcp-docs-server",
     "source": "github"
   },
-  "version": "0.3.1",
+  "version": "0.4.0-dev.1",
   "packages": [
     {
       "registryType": "npm",
       "registryBaseUrl": "https://registry.npmjs.org",
       "runtimeHint": "npx",
-      "version": "0.3.1",
+      "version": "0.4.0-dev.1",
       "identifier": "@mapbox/mcp-docs-server",
       "transport": {
         "type": "stdio"