diff --git a/emsdk_manifest.json b/emsdk_manifest.json
index 4a613b9..bbc2fe8 100644
--- a/emsdk_manifest.json
+++ b/emsdk_manifest.json
@@ -5,7 +5,7 @@
     "version": "master",
     "bitness": 32,
     "install_path": "llvm/git",
-    "git_branch": "master",
+    "git_branch": "main",
     "url": "https://github.com/llvm/llvm-project.git",
     "custom_install_script": "build_llvm",
     "only_supports_wasm": true,
@@ -19,7 +19,7 @@
     "version": "master",
     "bitness": 64,
     "install_path": "llvm/git",
-    "git_branch": "master",
+    "git_branch": "main",
     "url": "https://github.com/llvm/llvm-project.git",
     "custom_install_script": "build_llvm",
     "only_supports_wasm": true,