diff --git a/Formula/emacs.rb b/Formula/emacs.rb
index f680e94be813a..cdcfcb18aa6be 100644
--- a/Formula/emacs.rb
+++ b/Formula/emacs.rb
@@ -1,10 +1,10 @@
 class Emacs < Formula
   desc "GNU Emacs text editor"
   homepage "https://www.gnu.org/software/emacs/"
-  url "https://ftp.gnu.org/gnu/emacs/emacs-26.3.tar.xz"
-  mirror "https://ftpmirror.gnu.org/emacs/emacs-26.3.tar.xz"
-  sha256 "4d90e6751ad8967822c6e092db07466b9d383ef1653feb2f95c93e7de66d3485"
-  license "GPL-3.0"
+  url "https://ftp.gnu.org/gnu/emacs/emacs-27.1.tar.xz"
+  mirror "https://ftpmirror.gnu.org/emacs/emacs-27.1.tar.xz"
+  sha256 "4a4c128f915fc937d61edfc273c98106711b540c9be3cd5d2e2b9b5b2f172e41"
+  license "GPL-3.0-or-later"
 
   livecheck do
     url :stable
@@ -27,6 +27,7 @@ class Emacs < Formula
 
   depends_on "pkg-config" => :build
   depends_on "gnutls"
+  depends_on "jansson"
 
   uses_from_macos "libxml2"
   uses_from_macos "ncurses"
@@ -37,7 +38,6 @@ class Emacs < Formula
 
   def install
     args = %W[
-      --disable-dependency-tracking
       --disable-silent-rules
       --enable-locallisppath=#{HOMEBREW_PREFIX}/share/emacs/site-lisp
       --infodir=#{info}/emacs
@@ -56,6 +56,14 @@ def install
       system "./autogen.sh"
     end
 
+    File.write "lisp/site-load.el", <<~EOS
+      (setq exec-path (delete nil
+        (mapcar
+          (lambda (elt)
+            (unless (string-match-p "Homebrew/shims" elt) elt))
+          exec-path)))
+    EOS
+
     system "./configure", *args
     system "make"
     system "make", "install"