diff --git a/azure-functionapps.tf b/azure-functionapps.tf
index 9fcd538..c0d859f 100644
--- a/azure-functionapps.tf
+++ b/azure-functionapps.tf
@@ -22,5 +22,7 @@ resource "azurerm_linux_function_app" "fa-hanyadikhet" {
   storage_account_name = azurerm_storage_account.sa-hanyadikhet-functionapp.name
   service_plan_id      = azurerm_service_plan.sp-hanyadikhet-functionapp.id
 
+  python_version = "3.9"
+
   site_config {}
 }
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