diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 374ac53b2..9ffeb381b 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -1,7 +1,7 @@
 name: Build Quartz Site
 on:
   push:
-    branches: ["v4"]
+    branches: ["main"]
 permissions:
   contents: read
   pages: write
diff --git a/quartz/cli/constants.js b/quartz/cli/constants.js
index f4a9ce52b..21f340d59 100644
--- a/quartz/cli/constants.js
+++ b/quartz/cli/constants.js
@@ -6,7 +6,7 @@ import { readFileSync } from "fs"
  */
 export const ORIGIN_NAME = "origin"
 export const UPSTREAM_NAME = "upstream"
-export const QUARTZ_SOURCE_BRANCH = "v4"
+export const QUARTZ_SOURCE_BRANCH = "main"
 export const cwd = process.cwd()
 export const cacheDir = path.join(cwd, ".quartz-cache")
 export const cacheFile = "./quartz/.quartz-cache/transpiled-build.mjs"