diff --git a/samples/automl/automlVisionDataset.js b/samples/automl/automlVisionDataset.js
index 57ceea39..83429c09 100755
--- a/samples/automl/automlVisionDataset.js
+++ b/samples/automl/automlVisionDataset.js
@@ -348,7 +348,7 @@ require(`yargs`) // eslint-disable-line
     },
     projectId: {
       alias: `z`,
-      type: `number`,
+      type: `string`,
       default: process.env.GCLOUD_PROJECT,
       requiresArg: true,
       description: `The GCLOUD_PROJECT string, e.g. "my-gcloud-project"`,
diff --git a/samples/automl/automlVisionModel.js b/samples/automl/automlVisionModel.js
index 174a72ae..1a7c250a 100755
--- a/samples/automl/automlVisionModel.js
+++ b/samples/automl/automlVisionModel.js
@@ -541,7 +541,7 @@ require(`yargs`) // eslint-disable-line
     },
     projectId: {
       alias: `z`,
-      type: `number`,
+      type: `string`,
       default: process.env.GCLOUD_PROJECT,
       requiresArg: true,
       description: `The GCLOUD_PROJECT string, e.g. "my-gcloud-project"`,
diff --git a/samples/automl/automlVisionPredict.js b/samples/automl/automlVisionPredict.js
index 2aeb7927..195cb278 100755
--- a/samples/automl/automlVisionPredict.js
+++ b/samples/automl/automlVisionPredict.js
@@ -99,7 +99,7 @@ require(`yargs`) // eslint-disable-line
     },
     projectId: {
       alias: `z`,
-      type: `number`,
+      type: `string`,
       default: process.env.GCLOUD_PROJECT,
       requiresArg: true,
       description: `The GCLOUD_PROJECT string, e.g. "my-gcloud-project"`,