diff --git a/nginx.conf.sigil b/nginx.conf.sigil
index 3c388c9..91a3000 100644
--- a/nginx.conf.sigil
+++ b/nginx.conf.sigil
@@ -15,7 +15,7 @@ gzip_vary on;
 gzip_comp_level 6;" }}
 
 # CORS headers based on request methods
-{{ $cors_headers_options := "
+{{ $cors_headers_options := '
 if ($request_method = 'OPTIONS') {
     add_header 'Access-Control-Allow-Origin' '$allow_origin' always;
     add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
@@ -25,7 +25,7 @@ if ($request_method = 'OPTIONS') {
     add_header 'Content-Type' 'text/plain; charset=utf-8';
     add_header 'Content-Length' 0;
     return 204;
-}" }}
+}' }}
 
 {{ $cors_headers_post := "
 if ($request_method = 'POST') {