diff --git a/.env.example b/.env.example
index d843ca2a..3ac666fb 100644
--- a/.env.example
+++ b/.env.example
@@ -23,7 +23,7 @@ BACKEND_DOMAIN_NAME=backend.example.com
 # Obtain the following 2 values on the Pi Developer Portal (open develop.pi in the Pi Browser).
 
 # Domain validation key:
-DOMAIN_VALIDATION_KEY=todo_developer_portal
+DOMAIN_VALIDATION_KEY=5bd85afe4ad57b8d9633a9e609f0f207cb98af78d1b0c29f8ef8b14dec177132e5a005566b15c29f2723329bb91f8e8a861ad725963f49802772af0175334fd0
 # Pi Platform API Key:
 PI_API_KEY=todo_developer_portal