diff --git a/action.yml b/action.yml
index 302ab867..1c4d7293 100644
--- a/action.yml
+++ b/action.yml
@@ -294,7 +294,15 @@ inputs:
 
   region:
     description: |-
-      Region in which the Cloud Run services are deployed.
+      Region in which the Cloud Run services are deployed. Providing a list enables 
+      multi-region deployment. See the [documentation for deploying a multi-region 
+      service](https://docs.cloud.google.com/run/docs/multiple-regions#deploy)
+
+      Please note, this GitHub Action cannot parse regions provided in the metadata
+      YAML file and will always fallback to the region provided here, defaulting always
+      to `us-central1` if none is given. This is a known issue but this behavior being 
+      kept to avoid breaking existing actions.
+
     default: 'us-central1'
     required: false
 
diff --git a/package-lock.json b/package-lock.json
index 9c288f01..c4f5eec2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -474,6 +474,7 @@
       "integrity": "sha512-aPTXCrfwnDLj4VvXrm+UUCQjNEvJgNA8s5F1cvwQU+3KNltTOkBm1j30uNLyqqPNe7gE3KFzImYoZEfLhp4Yow==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "undici-types": "~7.10.0"
       }
@@ -524,6 +525,7 @@
       "integrity": "sha512-r1XG74QgShUgXph1BYseJ+KZd17bKQib/yF3SR+demvytiRXrwd12Blnz5eYGm8tXaeRdd4x88MlfwldHoudGg==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@typescript-eslint/scope-manager": "8.42.0",
         "@typescript-eslint/types": "8.42.0",
@@ -778,6 +780,7 @@
       "integrity": "sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -1163,6 +1166,7 @@
       "integrity": "sha512-RNCHRX5EwdrESy3Jc9o8ie8Bog+PeYvvSR8sDGoZxNFTvZ4dlxUB3WzQ3bQMztFrSRODGrLLj8g6OFuGY/aiQg==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.2.0",
         "@eslint-community/regexpp": "^4.12.1",
@@ -1224,6 +1228,7 @@
       "integrity": "sha512-82GZUjRS0p/jganf6q1rEO25VSoHH0hKPCTrgillPjdI/3bgBhAE1QzHrHTizjpRvy6pGAvKjDJtk2pF9NDq8w==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "eslint-config-prettier": "bin/cli.js"
       },
@@ -2234,6 +2239,7 @@
       "integrity": "sha512-I7AIg5boAr5R0FFtJ6rCfD+LFsWHp81dolrFD8S79U9tb8Az2nGrJncnMSnys+bpQJfRUzqs9hnA81OAA3hCuQ==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "prettier": "bin/prettier.cjs"
       },
@@ -2618,6 +2624,7 @@
       "integrity": "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==",
       "dev": true,
       "license": "Apache-2.0",
+      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
diff --git a/src/main.ts b/src/main.ts
index e53f4382..c422d9bc 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -248,12 +248,14 @@ export async function run(): Promise<void> {
         .flat()
         .filter((e) => e !== undefined && e !== null && e !== '')
         .join(',');
-      deployCmd.push('--region', regions);
-      updateTrafficCmd.push('--region', regions);
-    }
-    if (projectId) {
-      deployCmd.push('--project', projectId);
-      updateTrafficCmd.push('--project', projectId);
+
+      if (region?.length > 1) {
+        deployCmd.push('--regions', regions);
+        updateTrafficCmd.push('--regions', regions);
+      } else {
+        deployCmd.push('--region', regions);
+        updateTrafficCmd.push('--region', regions);
+      }
     }
 
     // Add optional deploy flags