diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 178a2fbe9..048e30e3d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,6 +1,8 @@
 on:
-  - pull_request
-  - push
+  pull_request:
+  push:
+  schedule:
+    - cron: '0 0 * * *'
 
 name: build
 
diff --git a/.github/workflows/mutation.yml b/.github/workflows/mutation.yml
index 75b65449c..1f6f14002 100644
--- a/.github/workflows/mutation.yml
+++ b/.github/workflows/mutation.yml
@@ -1,8 +1,8 @@
 on:
   pull_request:
   push:
-    branches:
-      - "master"
+  schedule:
+    - cron: '0 0 * * *'
 
 name: mutation test
 
diff --git a/.github/workflows/static.yml b/.github/workflows/static.yml
index 5780d460a..779237e66 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -1,8 +1,10 @@
 name: static analysis
 
 on:
-  - pull_request
-  - push
+  pull_request:
+  push:
+  schedule:
+    - cron: '0 0 * * *'
 
 jobs:
   mutation: