diff --git a/renovate.json b/renovate.json
deleted file mode 100644
index 7dac1bf1a..000000000
--- a/renovate.json
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": [
-    "config:base"
-  ],
-  "automerge": true,
-  "platformAutomerge": true,
-  "git-submodules": {
-    "enabled": true
-  },
-  "labels": [ "dependency upgrade" ],
-  "packageRules": [
-    {
-      "matchPackagePatterns": ["^line-openapi$"],
-      "labels": ["dependency upgrade", "line-openapi-update"]
-    }
-  ]
-}
diff --git a/renovate.json5 b/renovate.json5
new file mode 100644
index 000000000..b48b181bc
--- /dev/null
+++ b/renovate.json5
@@ -0,0 +1,24 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base"
+  ],
+  "timezone": "Asia/Tokyo",
+  "automerge": true,
+  "platformAutomerge": true,
+  "git-submodules": {
+    "enabled": true
+  },
+  "labels": [ "dependency upgrade" ],
+  "packageRules": [
+    {
+      "matchPackagePatterns": ["^line-openapi$"],
+      "labels": ["dependency upgrade", "line-openapi-update"],
+      // In many cases, we would like to update line-openapi by dispatching the GitHub workflow during working
+      // hours, as there are code changes.
+      // If that is forgotten, there's a possibility that line-openapi updates or code changes won't happen at
+      // all, so we allow it to run at night just in case.
+      "schedule": ["after 11pm and before 4am"]
+    }
+  ]
+}