diff --git a/modules/aws/main.tf b/modules/aws/main.tf
index e8b8998..791acae 100644
--- a/modules/aws/main.tf
+++ b/modules/aws/main.tf
@@ -3,7 +3,7 @@ data "aws_vpc" "default" {
 }
 
 module "instance_sg" {
-  source = "scottwinkler/sg/aws"
+  source = "terraform-in-action/sg/aws"
   vpc_id = data.aws_vpc.default.id
   ingress_rules = [
     {
@@ -14,7 +14,7 @@ module "instance_sg" {
 }
 
 module "iam_instance_profile" {
-  source  = "scottwinkler/iip/aws"
+  source  = "terraform-in-action/iip/aws"
   actions = ["logs:*", "ec2:DescribeInstances"]
 }
 
diff --git a/modules/aws/outputs.tf b/modules/aws/outputs.tf
index 7b52475..f8bdeaa 100644
--- a/modules/aws/outputs.tf
+++ b/modules/aws/outputs.tf
@@ -1,7 +1,7 @@
 output "public_ip" {
-    value = aws_instance.instance.public_ip
+  value = aws_instance.instance.public_ip
 }
 
 output "network_address" {
-    value = "${aws_instance.instance.public_ip}:8080"
+  value = "${aws_instance.instance.public_ip}:8080"
 }
\ No newline at end of file
diff --git a/modules/aws/variables.tf b/modules/aws/variables.tf
index 3d4e37e..55c0caa 100644
--- a/modules/aws/variables.tf
+++ b/modules/aws/variables.tf
@@ -1,11 +1,11 @@
 variable "environment" {
-    type = object({
-        name = string
-        background_color=string
-    })
+  type = object({
+    name             = string
+    background_color = string
+  })
 }
 
 variable "ssh_keypair" {
-    default = null
-    type = string
+  default = null
+  type    = string
 }
diff --git a/modules/aws/versions.tf b/modules/aws/versions.tf
new file mode 100644
index 0000000..f515d64
--- /dev/null
+++ b/modules/aws/versions.tf
@@ -0,0 +1,8 @@
+terraform {
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "~> 3.26"
+    }
+  }
+}
\ No newline at end of file
diff --git a/modules/azure/main.tf b/modules/azure/main.tf
index 9cb9f90..abdc5dd 100644
--- a/modules/azure/main.tf
+++ b/modules/azure/main.tf
@@ -110,7 +110,7 @@ resource "azurerm_virtual_machine" "virtual_machine" {
     computer_name  = "azure-vm"
     admin_username = "azure"
     admin_password = "Passwword1234"
-    custom_data    = templatefile("${path.module}/templates/startup.sh",{ NAME = var.environment.name, BG_COLOR = var.environment.background_color })
+    custom_data    = templatefile("${path.module}/templates/startup.sh", { NAME = var.environment.name, BG_COLOR = var.environment.background_color })
   }
   os_profile_linux_config {
     disable_password_authentication = false
diff --git a/modules/azure/outputs.tf b/modules/azure/outputs.tf
index 260205b..0bfacbb 100644
--- a/modules/azure/outputs.tf
+++ b/modules/azure/outputs.tf
@@ -1,7 +1,7 @@
 output "public_ip" {
-    value = azurerm_public_ip.public_ip.ip_address
+  value = azurerm_public_ip.public_ip.ip_address
 }
 
 output "network_address" {
-    value = "${azurerm_public_ip.public_ip.ip_address}:8080"
+  value = "${azurerm_public_ip.public_ip.ip_address}:8080"
 }
\ No newline at end of file
diff --git a/modules/azure/variables.tf b/modules/azure/variables.tf
index 7829b73..3ebe3c0 100644
--- a/modules/azure/variables.tf
+++ b/modules/azure/variables.tf
@@ -1,11 +1,11 @@
 variable "location" {
-    default = "westus2"
-    type = string
+  default = "westus2"
+  type    = string
 }
 
 variable "environment" {
-    type = object({
-        name = string
-        background_color=string
-    })
+  type = object({
+    name             = string
+    background_color = string
+  })
 }
\ No newline at end of file
diff --git a/modules/azure/versions.tf b/modules/azure/versions.tf
new file mode 100644
index 0000000..7940539
--- /dev/null
+++ b/modules/azure/versions.tf
@@ -0,0 +1,8 @@
+terraform {
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = "~> 2.45"
+    }
+  }
+}
\ No newline at end of file
diff --git a/modules/gcp/main.tf b/modules/gcp/main.tf
index b3a7d03..d556421 100644
--- a/modules/gcp/main.tf
+++ b/modules/gcp/main.tf
@@ -42,7 +42,7 @@ resource "google_compute_instance" "compute_instance" {
     }
   }
 
-  metadata_startup_script = templatefile("${path.module}/templates/startup.sh",{ NAME = var.environment.name, BG_COLOR = var.environment.background_color })
+  metadata_startup_script = templatefile("${path.module}/templates/startup.sh", { NAME = var.environment.name, BG_COLOR = var.environment.background_color })
 
   network_interface {
     network = "default"
diff --git a/modules/gcp/outputs.tf b/modules/gcp/outputs.tf
index 01c3ad9..95fea46 100644
--- a/modules/gcp/outputs.tf
+++ b/modules/gcp/outputs.tf
@@ -1,7 +1,7 @@
 output "public_ip" {
-    value = google_compute_instance.compute_instance.network_interface.0.access_config.0.nat_ip
+  value = google_compute_instance.compute_instance.network_interface.0.access_config.0.nat_ip
 }
 
 output "network_address" {
-    value = "${google_compute_instance.compute_instance.network_interface.0.access_config.0.nat_ip}:8080"
+  value = "${google_compute_instance.compute_instance.network_interface.0.access_config.0.nat_ip}:8080"
 }
\ No newline at end of file
diff --git a/modules/gcp/variables.tf b/modules/gcp/variables.tf
index 045f5ba..f41cd6a 100644
--- a/modules/gcp/variables.tf
+++ b/modules/gcp/variables.tf
@@ -1,17 +1,17 @@
 variable "project_id" {
-    description = "The GCP project id"
-    type = string
+  description = "The GCP project id"
+  type        = string
 }
 
 variable "region" {
-    default = "us-central1"
-    description = "GCP region"
-    type = string
+  default     = "us-central1"
+  description = "GCP region"
+  type        = string
 }
 
 variable "environment" {
-    type = object({
-        name = string
-        background_color=string
-    })
+  type = object({
+    name             = string
+    background_color = string
+  })
 }
\ No newline at end of file
diff --git a/modules/gcp/versions.tf b/modules/gcp/versions.tf
new file mode 100644
index 0000000..903d39c
--- /dev/null
+++ b/modules/gcp/versions.tf
@@ -0,0 +1,8 @@
+terraform {
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = "~> 3.54"
+    }
+  }
+}
\ No newline at end of file
diff --git a/modules/loadbalancer/main.tf b/modules/loadbalancer/main.tf
index 8836ed7..bac1e90 100644
--- a/modules/loadbalancer/main.tf
+++ b/modules/loadbalancer/main.tf
@@ -5,11 +5,11 @@ resource "docker_container" "loadbalancer" {
   name  = "tia-loadbalancer"
   image = "swinkler/tia-loadbalancer"
   env = [
-    "ADDRESSES=${join(" ",var.addresses)}"
+    "ADDRESSES=${join(" ", var.addresses)}"
   ]
   ports {
-   internal = 80
-   external = 5000
+    internal = 80
+    external = 5000
   }
 }
 
diff --git a/modules/loadbalancer/outputs.tf b/modules/loadbalancer/outputs.tf
index e30c25b..3658660 100644
--- a/modules/loadbalancer/outputs.tf
+++ b/modules/loadbalancer/outputs.tf
@@ -1,3 +1,3 @@
 output "network_address" {
-    value = "localhost:5000"
+  value = "localhost:5000"
 }
\ No newline at end of file
diff --git a/modules/loadbalancer/variables.tf b/modules/loadbalancer/variables.tf
index 48f773d..fabd968 100644
--- a/modules/loadbalancer/variables.tf
+++ b/modules/loadbalancer/variables.tf
@@ -1,3 +1,3 @@
 variable "addresses" {
-    type = list(string)
+  type = list(string)
 }
\ No newline at end of file
diff --git a/modules/loadbalancer/versions.tf b/modules/loadbalancer/versions.tf
new file mode 100644
index 0000000..beb1e28
--- /dev/null
+++ b/modules/loadbalancer/versions.tf
@@ -0,0 +1,8 @@
+terraform {
+  required_providers {
+    docker = {
+      source  = "kreuzwerker/docker"
+      version = "2.11.0"
+    }
+  }
+}
\ No newline at end of file