diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index aa77632..d59ead9 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -14,8 +14,8 @@ jobs:
     steps:
       - name: Checkout
         # for security reasons we pin commit ids and not tags.
-        # actions/checkout@v3.0.2 -> 2541b1294d2704b0964813337f33b291d3f8596b
-        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
+        # actions/checkout@v4.1.4 -> 0ad4b8fadaa221de15dcec353f45205ec38ea70b
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
         with:
           fetch-depth: 0
 
@@ -65,8 +65,8 @@ jobs:
     steps:
       - name: Checkout
         # for security reasons we pin commit ids and not tags.
-        # actions/checkout@v3.0.2 -> 2541b1294d2704b0964813337f33b291d3f8596b
-        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
+        # actions/checkout@v4.1.4 -> 0ad4b8fadaa221de15dcec353f45205ec38ea70b
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 0373d91..82bfa53 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -16,8 +16,8 @@ jobs:
     steps:
       - name: Checkout
         # for security reasons we pin commit ids and not tags.
-        # actions/checkout@v3.0.2 -> 2541b1294d2704b0964813337f33b291d3f8596b
-        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
+        # actions/checkout@v4.1.4 -> 0ad4b8fadaa221de15dcec353f45205ec38ea70b
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
         with:
           fetch-depth: 0
 
@@ -69,8 +69,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        # actions/checkout@v3.0.2
-        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
+        # actions/checkout@v4.1.4
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
         with:
           fetch-depth: 0
 
diff --git a/README.md b/README.md
index 2c7155f..418cf8d 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 A [Terraform] module for [Google Cloud Platform (GCP)][gcp].
 
 **_This module supports Terraform version 1
-and is compatible with the Terraform Google Provider version 4._** and 5._**
+and is compatible with the Terraform Google Provider version 4._** (4.28 and later) and 5._**
 
 This module is part of our Infrastructure as Code (IaC) framework
 that enables our users and customers to easily deploy and manage reusable,
@@ -207,10 +207,23 @@ See [variables.tf] and [examples/] for details and use-cases.
 
     Self-links of NAT IPs. Only valid if `natIpAllocateOption` is set to MANUAL_ONLY.
 
+  - [**`enable_dynamic_port_allocation`**](#attr-nats-enable_dynamic_port_allocation): *(Optional `bool`)*<a name="attr-nats-enable_dynamic_port_allocation"></a>
+
+    Enable Dynamic Port Allocation.
+    If minPortsPerVm is set, minPortsPerVm must be set to a power of two greater than or equal to 32.
+    If minPortsPerVm is not set, a minimum of 32 ports will be allocated to a VM from this NAT config.
+    If maxPortsPerVm is set, maxPortsPerVm must be set to a power of two greater than minPortsPerVm.
+    If maxPortsPerVm is not set, a maximum of 65536 ports will be allocated to a VM from this NAT config.
+    Mutually exclusive with enableEndpointIndependentMapping.
+
   - [**`min_ports_per_vm`**](#attr-nats-min_ports_per_vm): *(Optional `number`)*<a name="attr-nats-min_ports_per_vm"></a>
 
     Minimum number of ports allocated to a VM from this NAT.
 
+  - [**`min_ports_per_vm`**](#attr-nats-min_ports_per_vm): *(Optional `number`)*<a name="attr-nats-min_ports_per_vm"></a>
+
+    Maximum number of ports allocated to a VM from this NAT.
+
   - [**`udp_idle_timeout_sec`**](#attr-nats-udp_idle_timeout_sec): *(Optional `number`)*<a name="attr-nats-udp_idle_timeout_sec"></a>
 
     Timeout (in seconds) for UDP connections.
diff --git a/README.tfdoc.hcl b/README.tfdoc.hcl
index e6b2acb..6b843b6 100644
--- a/README.tfdoc.hcl
+++ b/README.tfdoc.hcl
@@ -40,7 +40,7 @@ section {
     A [Terraform] module for [Google Cloud Platform (GCP)][gcp].
 
     **_This module supports Terraform version 1
-    and is compatible with the Terraform Google Provider version 4._** and 5._**
+    and is compatible with the Terraform Google Provider version 4._** (4.28 and later) and 5._**
 
     This module is part of our Infrastructure as Code (IaC) framework
     that enables our users and customers to easily deploy and manage reusable,
@@ -269,6 +269,18 @@ section {
               END
             }
 
+            attribute "enable_dynamic_port_allocation" {
+              type        = bool
+              description = <<-END
+                Enable Dynamic Port Allocation.
+                If minPortsPerVm is set, minPortsPerVm must be set to a power of two greater than or equal to 32.
+                If minPortsPerVm is not set, a minimum of 32 ports will be allocated to a VM from this NAT config.
+                If maxPortsPerVm is set, maxPortsPerVm must be set to a power of two greater than minPortsPerVm.
+                If maxPortsPerVm is not set, a maximum of 65536 ports will be allocated to a VM from this NAT config.
+                Mutually exclusive with enableEndpointIndependentMapping.
+              END
+            }
+
             attribute "min_ports_per_vm" {
               type        = number
               description = <<-END
@@ -276,6 +288,13 @@ section {
               END
             }
 
+            attribute "min_ports_per_vm" {
+              type        = number
+              description = <<-END
+                Maximum number of ports allocated to a VM from this NAT.
+              END
+            }
+
             attribute "udp_idle_timeout_sec" {
               type        = number
               default     = 30
diff --git a/nat.tf b/nat.tf
index d1086e0..75a7b88 100644
--- a/nat.tf
+++ b/nat.tf
@@ -15,7 +15,9 @@ resource "google_compute_router_nat" "nat" {
 
   nat_ips = try(each.value.nat_ips, null)
 
-  min_ports_per_vm = try(each.value.min_ports_per_vm, null)
+  enable_dynamic_port_allocation = try(each.value.enable_dynamic_port_allocation, null)
+  min_ports_per_vm               = try(each.value.min_ports_per_vm, null)
+  max_ports_per_vm               = try(each.value.max_ports_per_vm, null)
 
   udp_idle_timeout_sec             = try(each.value.idle_timeout_sec, 30)
   icmp_idle_timeout_sec            = try(each.value.icmp_idle_timeout_sec, 30)
diff --git a/versions.tf b/versions.tf
index c37cb64..6fee474 100644
--- a/versions.tf
+++ b/versions.tf
@@ -8,7 +8,7 @@ terraform {
   required_providers {
     google = {
       source  = "hashicorp/google"
-      version = ">= 3.50, < 6"
+      version = ">= 4.28, < 6"
     }
   }
 }