diff --git a/versions.tf b/versions.tf
index ffd4819..525cc5d 100644
--- a/versions.tf
+++ b/versions.tf
@@ -1,13 +1,13 @@
 terraform {
   required_providers {
     cloudflare = {
-      source = "cloudflare/cloudflare"
+      source = "registry.opentofu.org/cloudflare/cloudflare"
     }
     hcloud = {
-      source = "hetznercloud/hcloud"
+      source = "registry.opentofu.org/hetznercloud/hcloud"
     }
     restapi = {
-      source = "thegeeklab/restapi"
+      source = "registry.opentofu.org/thegeeklab/restapi"
     }
   }
 }