diff --git a/.github/workflows/auto-merge.yml b/.github/workflows/auto-merge.yml
deleted file mode 100644
index c6df7f0..0000000
--- a/.github/workflows/auto-merge.yml
+++ /dev/null
@@ -1,24 +0,0 @@
-name: Auto-merge
-
-on:
-  pull_request:
-    types: [opened, synchronize, reopened]
-
-permissions:
-  contents: write
-  pull-requests: write
-
-jobs:
-  auto-merge:
-    if: github.event.pull_request.user.login == 'chiply' && github.event.pull_request.head.repo.full_name == github.event.pull_request.base.repo.full_name
-    runs-on: ubuntu-latest
-    steps:
-      - name: Approve PR
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: gh pr review "${{ github.event.pull_request.number }}" --repo "${{ github.repository }}" --approve
-
-      - name: Enable auto-merge
-        env:
-          GH_TOKEN: ${{ github.token }}
-        run: gh pr merge "${{ github.event.pull_request.number }}" --repo "${{ github.repository }}" --auto --squash
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0d03b92..dbf8175 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,10 @@ on:
   pull_request:
     branches: [main]
 
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 
@@ -15,14 +19,20 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, windows-latest]
         emacs-version:
+          - 28.2
           - 29.4
+          - 30.2
           - snapshot
 
     steps:
       - uses: actions/checkout@v4
 
+      - name: Cache Nix store
+        if: runner.os != 'Windows'
+        uses: DeterminateSystems/magic-nix-cache-action@main
+
       - name: Set up Emacs
         uses: jcs090218/setup-emacs@master
         with:
@@ -33,6 +43,12 @@ jobs:
         with:
           version: 'snapshot'
 
+      - name: Cache Eask dependencies
+        uses: actions/cache@v4
+        with:
+          path: .eask
+          key: eask-${{ runner.os }}-${{ matrix.emacs-version }}-${{ hashFiles('Eask') }}
+
       - name: Install dependencies
         run: eask install-deps
 
@@ -42,6 +58,33 @@ jobs:
       - name: Run tests
         run: eask test ert test/space-tree-test.el
 
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Cache Nix store
+        uses: DeterminateSystems/magic-nix-cache-action@main
+
+      - name: Set up Emacs
+        uses: jcs090218/setup-emacs@master
+        with:
+          version: 29.4
+
+      - name: Set up Eask
+        uses: emacs-eask/setup-eask@master
+        with:
+          version: 'snapshot'
+
+      - name: Cache Eask dependencies
+        uses: actions/cache@v4
+        with:
+          path: .eask
+          key: eask-lint-${{ hashFiles('Eask') }}
+
+      - name: Install dependencies
+        run: eask install-deps
+
       - name: Package lint
         run: eask lint package
         continue-on-error: true
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 14d1f1e..8f5491a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -13,28 +13,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: googleapis/release-please-action@v4
-        id: release
         with:
           config-file: release-please-config.json
           manifest-file: .release-please-manifest.json
-
-      - uses: actions/checkout@v4
-        if: ${{ steps.release.outputs.release_created }}
-
-      - name: Update version in Elisp files
-        if: ${{ steps.release.outputs.release_created }}
-        run: |
-          VERSION="${{ steps.release.outputs.major }}.${{ steps.release.outputs.minor }}.${{ steps.release.outputs.patch }}"
-          for file in *.el; do
-            sed -i "s/;; Version: .*/;; Version: ${VERSION}/" "$file"
-          done
-          sed -i "s/\"[0-9]*\.[0-9]*\.[0-9]*\"/\"${VERSION}\"/" Eask
-
-      - name: Commit version bump
-        if: ${{ steps.release.outputs.release_created }}
-        run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git add -A
-          git diff --staged --quiet || git commit -m "chore: bump version to ${{ steps.release.outputs.tag_name }}"
-          git push
diff --git a/Eask b/Eask
index bea8dd1..4637f7c 100644
--- a/Eask
+++ b/Eask
@@ -1,7 +1,9 @@
 ; -*- lexical-binding: t -*-
 
 (package "space-tree"
+; x-release-please-start-version
          "0.1.0"
+; x-release-please-end
          "Tree-based workspace management")
 
 (website-url "https://github.com/chiply/space-tree")
@@ -15,7 +17,7 @@
 (source "gnu")
 (source "melpa")
 
-(depends-on "emacs" "29.1")
+(depends-on "emacs" "28.1")
 (depends-on "ht" "2.3")
 (depends-on "dash" "2.19")
 
diff --git a/README.md b/README.md
index b44b454..ccb7c81 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # space-tree
 
-Tree-based workspace management for Emacs.
+Tree-based workspace management for Emacs. Supports Emacs 28.1+.
 
 ## Overview
 
diff --git a/release-please-config.json b/release-please-config.json
index c9a5c0a..26ce142 100644
--- a/release-please-config.json
+++ b/release-please-config.json
@@ -7,7 +7,17 @@
       "bump-minor-pre-major": true,
       "bump-patch-for-minor-pre-major": true,
       "include-component-in-tag": false,
-      "include-v-in-tag": true
+      "include-v-in-tag": true,
+      "extra-files": [
+        {
+          "type": "generic",
+          "path": "space-tree.el"
+        },
+        {
+          "type": "generic",
+          "path": "Eask"
+        }
+      ]
     }
   }
 }
diff --git a/space-tree.el b/space-tree.el
index 8fa5d39..0c21140 100644
--- a/space-tree.el
+++ b/space-tree.el
@@ -5,8 +5,10 @@
 ;; Author: Charlie Holland <mister.chiply@gmail.com>
 ;; Maintainer: Charlie Holland <mister.chiply@gmail.com>
 ;; URL: https://github.com/chiply/space-tree
+;; x-release-please-start-version
 ;; Version: 0.1.0
-;; Package-Requires: ((emacs "29.1") (ht "2.3") (dash "2.19"))
+;; x-release-please-end
+;; Package-Requires: ((emacs "28.1") (ht "2.3") (dash "2.19"))
 ;; Keywords: convenience, frames
 
 ;;; Commentary:
@@ -238,7 +240,8 @@ SPACES-THIS-LEVEL-HT is the hashtable of spaces at this level."
                    (propertize (concat space-name-or-number "' ") 'face 'bold)
                  (concat space-name-or-number " "))
                )))
-   (sort (ht-keys spaces-this-level-ht) (lambda (a b) (< a b)))))
+   (sort (ht-keys spaces-this-level-ht) (lambda (a b) (< a b)))
+   ""))
 
 (defun space-tree-modeline-lighter ()
   "Return a string to be used as the modeline lighter for space-tree.