diff --git a/examples/forwarding-zone/versions.tf b/examples/forwarding-zone/versions.tf
index 2970427..122b5a5 100644
--- a/examples/forwarding-zone/versions.tf
+++ b/examples/forwarding-zone/versions.tf
@@ -15,5 +15,15 @@
  */
 
 terraform {
-  required_version = ">= 0.12"
+  required_version = ">= 0.13"
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = "~> 4.0"
+    }
+    google-beta = {
+      source  = "hashicorp/google-beta"
+      version = "~> 4.0"
+    }
+  }
 }
diff --git a/examples/peering-zone/versions.tf b/examples/peering-zone/versions.tf
index 832ec1d..396bd73 100644
--- a/examples/peering-zone/versions.tf
+++ b/examples/peering-zone/versions.tf
@@ -15,5 +15,15 @@
  */
 
 terraform {
-  required_version = ">= 0.12"
+  required_version = ">= 0.13"
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = "~> 4.0"
+    }
+    google-beta = {
+      source  = "hashicorp/google-beta"
+      version = "~> 4.0"
+    }
+  }
 }
diff --git a/examples/private-zone/providers.tf b/examples/private-zone/providers.tf
deleted file mode 100644
index 01ad976..0000000
--- a/examples/private-zone/providers.tf
+++ /dev/null
@@ -1,23 +0,0 @@
-/**
- * Copyright 2019 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-provider "google" {
-  version = ">= 3.63.0"
-}
-
-provider "google-beta" {
-  version = ">= 3.63.0"
-}
diff --git a/examples/forwarding-zone/providers.tf b/examples/private-zone/versions.tf
similarity index 67%
rename from examples/forwarding-zone/providers.tf
rename to examples/private-zone/versions.tf
index 7b4094f..c7fc4a6 100644
--- a/examples/forwarding-zone/providers.tf
+++ b/examples/private-zone/versions.tf
@@ -1,5 +1,5 @@
 /**
- * Copyright 2019 Google LLC
+ * Copyright 2021 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,10 +14,16 @@
  * limitations under the License.
  */
 
-provider "google" {
-  version = ">= 2.14"
-}
-
-provider "google-beta" {
-  version = ">= 2.14"
+terraform {
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = "~> 4.0"
+    }
+    google-beta = {
+      source  = "hashicorp/google-beta"
+      version = "~> 4.0"
+    }
+  }
+  required_version = ">= 0.13"
 }
diff --git a/examples/public-zone/providers.tf b/examples/public-zone/providers.tf
deleted file mode 100644
index 01ad976..0000000
--- a/examples/public-zone/providers.tf
+++ /dev/null
@@ -1,23 +0,0 @@
-/**
- * Copyright 2019 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-provider "google" {
-  version = ">= 3.63.0"
-}
-
-provider "google-beta" {
-  version = ">= 3.63.0"
-}
diff --git a/examples/peering-zone/providers.tf b/examples/public-zone/versions.tf
similarity index 67%
rename from examples/peering-zone/providers.tf
rename to examples/public-zone/versions.tf
index 7b4094f..c7fc4a6 100644
--- a/examples/peering-zone/providers.tf
+++ b/examples/public-zone/versions.tf
@@ -1,5 +1,5 @@
 /**
- * Copyright 2019 Google LLC
+ * Copyright 2021 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,10 +14,16 @@
  * limitations under the License.
  */
 
-provider "google" {
-  version = ">= 2.14"
-}
-
-provider "google-beta" {
-  version = ">= 2.14"
+terraform {
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = "~> 4.0"
+    }
+    google-beta = {
+      source  = "hashicorp/google-beta"
+      version = "~> 4.0"
+    }
+  }
+  required_version = ">= 0.13"
 }
diff --git a/test/setup/make_source.sh b/test/setup/make_source.sh
deleted file mode 100755
index f2b63a6..0000000
--- a/test/setup/make_source.sh
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/env bash
-
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-echo "#!/usr/bin/env bash" > ../source.sh
-
-project_id=$(terraform output project_id)
-echo "export TF_VAR_project_id='$project_id'" >> ../source.sh
-
-sa_json=$(terraform output sa_key)
-# shellcheck disable=SC2086
-echo "export SERVICE_ACCOUNT_JSON='$(echo $sa_json | base64 --decode)'" >> ../source.sh
diff --git a/test/setup/versions.tf b/test/setup/versions.tf
index 5394826..7c2aee7 100644
--- a/test/setup/versions.tf
+++ b/test/setup/versions.tf
@@ -15,13 +15,15 @@
  */
 
 terraform {
-  required_version = ">= 0.12"
-}
-
-provider "google" {
-  version = ">= 3.63"
-}
-
-provider "google-beta" {
-  version = ">= 3.63"
+  required_version = ">= 0.13"
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = ">= 3.63"
+    }
+    google-beta = {
+      source  = "hashicorp/google-beta"
+      version = ">= 3.63"
+    }
+  }
 }
diff --git a/versions.tf b/versions.tf
index 93f4b03..2bb8576 100644
--- a/versions.tf
+++ b/versions.tf
@@ -20,11 +20,11 @@ terraform {
 
     google = {
       source  = "hashicorp/google"
-      version = "~> 3.53"
+      version = ">= 3.53, < 5.0"
     }
     google-beta = {
       source  = "hashicorp/google-beta"
-      version = "~> 3.53"
+      version = ">= 3.53, < 5.0"
     }
   }