diff --git a/packages/plugin-core/src/index.ts b/packages/plugin-core/src/index.ts
index ff40414339..59279b4de6 100644
--- a/packages/plugin-core/src/index.ts
+++ b/packages/plugin-core/src/index.ts
@@ -151,14 +151,14 @@ const methods = wrapper<Manifest>({
   }),
 
   webhook: ({ config, data, functions, type, trigger }) => {
-    const headers: Record<string, string> = {
-      'Content-Type': 'application/json',
-    };
+    const headers: Record<string, string> = {};
 
     if (config.headerName && config.headerValue) {
       headers[config.headerName] = config.headerValue;
     }
 
+    headers['Content-Type'] = 'application/json';
+
     functions.httpRequest(config.url, {
       method: config.method ?? 'POST',
       body: JSON.stringify({