diff --git a/packages/components/nodes/chains/ApiChain/OpenAPIChain.ts b/packages/components/nodes/chains/ApiChain/OpenAPIChain.ts
index 2e54d2375..a7e8441a8 100644
--- a/packages/components/nodes/chains/ApiChain/OpenAPIChain.ts
+++ b/packages/components/nodes/chains/ApiChain/OpenAPIChain.ts
@@ -45,7 +45,7 @@ class OpenApiChain_Chains implements INode {
 
     async init(nodeData: INodeData): Promise<any> {
         const model = nodeData.inputs?.model as ChatOpenAI
-        const headers = nodeData.inputs?.headers as Record<string, string>
+        const headers = nodeData.inputs?.headers as string
         const yamlFileBase64 = nodeData.inputs?.yamlFile as string
         const splitDataURI = yamlFileBase64.split(',')
         splitDataURI.pop()
@@ -53,7 +53,7 @@ class OpenApiChain_Chains implements INode {
         const utf8String = bf.toString('utf-8')
         const chain = await createOpenAPIChain(utf8String, {
             llm: model,
-            headers
+            headers: typeof headers === 'object' ? headers : headers ? JSON.parse(headers) : {}
         })
         return chain
     }