diff --git a/lib/Controller/AddCspTrait.php b/lib/Controller/AddCspTrait.php
index 45848d358..a3fc14dc4 100644
--- a/lib/Controller/AddCspTrait.php
+++ b/lib/Controller/AddCspTrait.php
@@ -47,6 +47,10 @@ private function addCsp(Response $response): void {
 					$cleanUrl .= ':' . $port;
 				}
 				$csp->addAllowedConnectDomain($cleanUrl);
+
+				if ($host === 'api.protomaps.com') {
+					$csp->addAllowedConnectDomain('https://protomaps.github.io');
+				}
 			}
 		}