diff --git a/modules/digitalocean-droplets/variables.tf b/modules/digitalocean-droplets/variables.tf
index 2e74e98..d75cf1a 100644
--- a/modules/digitalocean-droplets/variables.tf
+++ b/modules/digitalocean-droplets/variables.tf
@@ -6,20 +6,25 @@ variable "do_token" {
 
 variable "vm_name" {
   description = "Name of the Droplet"
+  type        = string
 }
 
 variable "region" {
   description = "DigitalOcean region"
+  type        = string
 }
 
 variable "size" {
   description = "Droplet size"
+  type        = string
 }
 
 variable "user" {
   description = "user name"
+  type        = string
 }
 
 variable "caddy" {
   description = "Whether to use Caddy or not, leave empty to disable"
+  type        = string
 }
\ No newline at end of file