diff --git a/homeassistant/components/diagnostics/__init__.py b/homeassistant/components/diagnostics/__init__.py
index 4f98aa06e048..a0f161b23aec 100644
--- a/homeassistant/components/diagnostics/__init__.py
+++ b/homeassistant/components/diagnostics/__init__.py
@@ -143,8 +143,8 @@ async def _async_get_json_file_response(
     all_custom_components = await async_get_custom_components(hass)
     for cc_domain, cc_obj in all_custom_components.items():
         custom_components[cc_domain] = {
-            "version": cc_obj.manifest["version"],
-            "requirements": cc_obj.manifest["requirements"],
+            "version": cc_obj.version,
+            "requirements": cc_obj.requirements,
         }
     try:
         json_data = json.dumps(