diff --git a/testdata/main.tf b/testdata/main.tf
index fc422e0..f142824 100644
--- a/testdata/main.tf
+++ b/testdata/main.tf
@@ -9,7 +9,7 @@ terraform {
 
     azurerm = {
       source  = "hashicorp/azurerm"
-      version = "~> 3.77.0"
+      version = "~> 3.78.0"
     }
   }
 }