diff --git a/.github/workflows/build-plugin.yml b/.github/workflows/build-plugin.yml
index da5e6f6ff..f051b3b6b 100644
--- a/.github/workflows/build-plugin.yml
+++ b/.github/workflows/build-plugin.yml
@@ -70,7 +70,7 @@ jobs:
       - name: install deps
         run: |
           yarn install --frozen-lockfile
-          yarn add -W typescript@next jest ts-jest ts-node ynpx lerna yarn-tool
+          yarn add -W typescript@4.6.1-rc jest ts-jest ts-node ynpx lerna yarn-tool
       - name: run ci:build
         if: success()
 #        env:
diff --git a/.github/workflows/check-pr.yml b/.github/workflows/check-pr.yml
index 126eb6426..425f716b6 100644
--- a/.github/workflows/check-pr.yml
+++ b/.github/workflows/check-pr.yml
@@ -37,7 +37,7 @@ jobs:
       - name: install deps
         run: |
           yarn install --frozen-lockfile
-          yarn add -W typescript@next jest ts-jest ts-node ynpx lerna
+          yarn add -W typescript@4.6.1-rc jest ts-jest ts-node ynpx lerna
       - name: run script
         if: success()
 #        env:
diff --git a/package.json b/package.json
index 378bce381..0ddfea298 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "build:tsdx": "ynpx @bluelovers/tsdx build --target node --name index",
     "postbuild": "yarn run test",
     "ci:test": "yarn run test",
-    "ci:install": "yarn install --frozen-lockfile && yarn add -W typescript@next jest ts-jest ts-node ynpx lerna yarn-tool",
+    "ci:install": "yarn install --frozen-lockfile && yarn add -W typescript@4.6.1-rc jest ts-jest ts-node ynpx lerna yarn-tool",
     "ci:build": "yarn run plugin:build && yarn run build:commit",
     "ci:postpublish": "ts-node scripts/ci-postpublish.ts && yarn run postpublish:git:tag && echo ci:postpublish",
     "_ci:postpublish": "yarn run postpublish:changelog && yarn run postpublish:git:commit && yarn run postpublish:git:tag & echo ci:postpublish",