diff --git a/server/utils/helcim.js b/server/utils/helcim.js
index 37bc69a..dac997a 100644
--- a/server/utils/helcim.js
+++ b/server/utils/helcim.js
@@ -51,7 +51,7 @@ export async function helcimFetch(path, { method = 'GET', body, idempotencyKey,
   const response = await fetch(`${HELCIM_API_BASE}${path}`, {
     method,
     headers,
-    body: body ? JSON.stringify(body) : undefined
+    body: body !== undefined ? JSON.stringify(body) : undefined
   })
 
   if (!response.ok) {