diff --git a/web/src/app/admin/configuration/llm/LLMProviderUpdateForm.tsx b/web/src/app/admin/configuration/llm/LLMProviderUpdateForm.tsx
index 80c7ce0f3b31..7968fc5d7bf7 100644
--- a/web/src/app/admin/configuration/llm/LLMProviderUpdateForm.tsx
+++ b/web/src/app/admin/configuration/llm/LLMProviderUpdateForm.tsx
@@ -104,7 +104,7 @@ export function LLMProviderUpdateForm({
       : {}),
     deployment_name: llmProviderDescriptor.deployment_name_required
       ? Yup.string().required("Deployment Name is required")
-      : Yup.string(),
+      : Yup.string().nullable(),
     default_model_name: Yup.string().required("Model name is required"),
     fast_default_model_name: Yup.string().nullable(),
     // EE Only