diff --git a/Makefile b/Makefile
index dc91e40..e2a15fa 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ GOFMT_FILES?=$$(find . -name '*.go' |grep -v vendor)
 
 GOFMT ?= gofmt -s
 
-VERSION = 0.6.1
+VERSION = 0.7.0
 
 test: fmt-check
 	go test -i $(TEST) || exit 1
diff --git a/README.md b/README.md
index fb52c6e..3f7670a 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ terraform {
   required_providers {
     gitea = {
       source = "Lerentis/gitea"
-      version = "0.6.1"
+      version = "0.7.0"
     }
   }
 }
diff --git a/examples/provider.tf b/examples/provider.tf
index 0e08f75..0d34bb4 100644
--- a/examples/provider.tf
+++ b/examples/provider.tf
@@ -2,7 +2,7 @@ terraform {
   required_providers {
     gitea = {
       source = "terraform.local/lerentis/gitea"
-      version = "0.6.1"
+      version = "0.7.0"
     }
   }
 }
diff --git a/gitea/provider.go b/gitea/provider.go
index 11daf15..32c5da6 100644
--- a/gitea/provider.go
+++ b/gitea/provider.go
@@ -118,5 +118,8 @@ func validateAPIURLVersion(value interface{}, key string) (ws []string, es []err
 	if strings.HasSuffix(v, "/api/v1") || strings.HasSuffix(v, "/api/v1/") {
 		es = append(es, fmt.Errorf("terraform-gitea-provider base URL format is incorrect; Please leave out API Path %s", v))
 	}
+	if strings.Contains(v, "localhost") && strings.Contains(v, ".") {
+		es = append(es, fmt.Errorf("terraform-gitea-provider base URL violates RFC 2606; Please do not define a subdomain for localhost!"))
+	}
 	return
 }