diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 4460c08d..bf809b39 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -14,7 +14,7 @@ jobs:
 
       - uses: purcell/setup-emacs@master
         with:
-          version: 27.1
+          version: 28.1
 
       - uses: conao3/setup-cask@master
         with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ccc4fd2d..011ba685 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,6 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         emacs-version:
-          - 27.2
           - 28.2
           - 29.4
           - 30.1
@@ -36,9 +35,6 @@ jobs:
           - os: windows-latest
             emacs-version: snapshot
             experimental: true
-        exclude:
-          - os: macos-latest
-            emacs-version: 27.2
 
     steps:
       - uses: jcs090218/setup-emacs@master
diff --git a/Eask b/Eask
index 886c7fb7..edc9b666 100644
--- a/Eask
+++ b/Eask
@@ -11,10 +11,10 @@
 
 (script "test" "echo \"Error: no test specified\" && exit 1")
 
-(source "gnu")
-(source "melpa")
+(source 'gnu)
+(source 'melpa)
 
-(depends-on "emacs" "27.1")
+(depends-on "emacs" "28.1")
 (depends-on "dash")
 (depends-on "lsp-mode")
 (depends-on "markdown-mode")
diff --git a/lsp-ui.el b/lsp-ui.el
index 1f0ce92f..f4af115f 100644
--- a/lsp-ui.el
+++ b/lsp-ui.el
@@ -6,7 +6,7 @@
 ;; Author: Sebastien Chapuis <sebastien@chapu.is>, Fangrui Song <i@maskray.me>
 ;; Keywords: languages, tools
 ;; URL: https://github.com/emacs-lsp/lsp-ui
-;; Package-Requires: ((emacs "27.1") (dash "2.18.0") (lsp-mode "6.0") (markdown-mode "2.3"))
+;; Package-Requires: ((emacs "28.1") (dash "2.18.0") (lsp-mode "6.0") (markdown-mode "2.3"))
 ;; Version: 9.0.0
 
 ;;; License