diff --git a/server/utils/helcim.js b/server/utils/helcim.js
index a0a28c8..d891612 100644
--- a/server/utils/helcim.js
+++ b/server/utils/helcim.js
@@ -63,7 +63,13 @@ export async function helcimFetch(path, { method = 'GET', body, idempotencyKey,
     })
   }
 
-  return await response.json()
+  const text = await response.text()
+  if (!text.trim()) return null
+  try {
+    return JSON.parse(text)
+  } catch {
+    return null
+  }
 }
 
 // ---- Customers ----