diff --git a/.release-please.manifest.json b/.release-please.manifest.json
index 068055a..5cab6d9 100644
--- a/.release-please.manifest.json
+++ b/.release-please.manifest.json
@@ -1,4 +1,4 @@
 {
-  "server": "0.1.2",
-  "client": "0.1.2"
+  "server": "1.0.0-alpha",
+  "client": "1.0.0-alpha"
 }
diff --git a/client/CHANGELOG.md b/client/CHANGELOG.md
index efe3a16..aa09e47 100644
--- a/client/CHANGELOG.md
+++ b/client/CHANGELOG.md
@@ -1,5 +1,21 @@
 # Changelog
 
+## [1.0.0-alpha](https://github.com/copick/copick-web/compare/client-v0.1.2...client-v1.0.0-alpha) (2026-10-08)
+
+
+### ⚠ BREAKING CHANGES
+
+* support OME-Zarr 0.5 and Zarr v3 ([#19](https://github.com/copick/copick-web/issues/19))
+
+### Features
+
+* multi-panel viewer, filaments, instance and panoptic segmentations (Zarr v3) ([#21](https://github.com/copick/copick-web/issues/21)) ([4f6b2ee](https://github.com/copick/copick-web/commit/4f6b2eeadfba0ae52feb3b0a27cf510c8629798c))
+* reload the project from the sidebar ([#23](https://github.com/copick/copick-web/issues/23)) ([8e8c6aa](https://github.com/copick/copick-web/commit/8e8c6aa4848c03e0a8f08992c0a74f87acf98494))
+* selectable slice orientations ([0f3bb06](https://github.com/copick/copick-web/commit/0f3bb06fc945922ecc3e2ebea9521759efcac1f2))
+* selectable slice orientations ([f4b9a34](https://github.com/copick/copick-web/commit/f4b9a34f28c7b50bb948d978609fc27ffc220165))
+* serve under any URL prefix, set at runtime ([#27](https://github.com/copick/copick-web/issues/27)) ([55fb631](https://github.com/copick/copick-web/commit/55fb6311e8453ca3690544f0c98548b68262221e))
+* support OME-Zarr 0.5 and Zarr v3 ([#19](https://github.com/copick/copick-web/issues/19)) ([9a21984](https://github.com/copick/copick-web/commit/9a21984b3064cd0b8a83582b658ed875bb45d6a8))
+
 ## [0.1.2](https://github.com/copick/copick-web/compare/client-v0.1.1...client-v0.1.2) (2026-07-24)
 
 
diff --git a/client/package-lock.json b/client/package-lock.json
index 931015d..ce5baa9 100644
--- a/client/package-lock.json
+++ b/client/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "copick-web-client",
-  "version": "0.1.2",
+  "version": "1.0.0-alpha",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "copick-web-client",
-      "version": "0.1.2",
+      "version": "1.0.0-alpha",
       "dependencies": {
         "@czi-sds/components": "^22.11.4",
         "@emotion/react": "^11.13.0",
diff --git a/client/package.json b/client/package.json
index 568dd35..9159cd7 100644
--- a/client/package.json
+++ b/client/package.json
@@ -1,7 +1,7 @@
 {
   "name": "copick-web-client",
   "private": true,
-  "version": "0.1.2",
+  "version": "1.0.0-alpha",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/server/CHANGELOG.md b/server/CHANGELOG.md
index 0352b3b..64ac356 100644
--- a/server/CHANGELOG.md
+++ b/server/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## [1.0.0-alpha](https://github.com/copick/copick-web/compare/server-v0.1.2...server-v1.0.0-alpha) (2026-10-08)
+
+
+### ⚠ BREAKING CHANGES
+
+* support OME-Zarr 0.5 and Zarr v3 ([#19](https://github.com/copick/copick-web/issues/19))
+
+### Features
+
+* multi-panel viewer, filaments, instance and panoptic segmentations (Zarr v3) ([#21](https://github.com/copick/copick-web/issues/21)) ([4f6b2ee](https://github.com/copick/copick-web/commit/4f6b2eeadfba0ae52feb3b0a27cf510c8629798c))
+* reload the project from the sidebar ([#23](https://github.com/copick/copick-web/issues/23)) ([8e8c6aa](https://github.com/copick/copick-web/commit/8e8c6aa4848c03e0a8f08992c0a74f87acf98494))
+* serve under any URL prefix, set at runtime ([#27](https://github.com/copick/copick-web/issues/27)) ([55fb631](https://github.com/copick/copick-web/commit/55fb6311e8453ca3690544f0c98548b68262221e))
+* support OME-Zarr 0.5 and Zarr v3 ([#19](https://github.com/copick/copick-web/issues/19)) ([9a21984](https://github.com/copick/copick-web/commit/9a21984b3064cd0b8a83582b658ed875bb45d6a8))
+
 ## [0.1.2](https://github.com/copick/copick-web/compare/server-v0.1.1...server-v0.1.2) (2026-07-24)
 
 
diff --git a/server/pyproject.toml b/server/pyproject.toml
index 4cdeac6..6704666 100644
--- a/server/pyproject.toml
+++ b/server/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "copick-web"
-version = "0.1.2"
+version = "1.0.0-alpha"
 description = "Web visualization for copick datasets"
 requires-python = ">=3.11"
 dependencies = [
diff --git a/server/src/copick_web/__init__.py b/server/src/copick_web/__init__.py
index 2578bd0..4a27357 100644
--- a/server/src/copick_web/__init__.py
+++ b/server/src/copick_web/__init__.py
@@ -1,3 +1,3 @@
 """Copick Web - Web visualization for copick datasets."""
 
-__version__ = "0.1.2"
+__version__ = "1.0.0-alpha"