diff --git a/packages/nodes-base/nodes/HttpRequest/HttpRequest.node.ts b/packages/nodes-base/nodes/HttpRequest/HttpRequest.node.ts
index 7ad64d59b7..dfd1835fc7 100644
--- a/packages/nodes-base/nodes/HttpRequest/HttpRequest.node.ts
+++ b/packages/nodes-base/nodes/HttpRequest/HttpRequest.node.ts
@@ -851,6 +851,9 @@ export class HttpRequest implements INodeType {
 									}
 								};
 								requestOptions[optionName][parameterDataName] = computeNewValue(requestOptions[optionName][parameterDataName]);
+							} else if (optionName === 'headers') {
+								// @ts-ignore
+								requestOptions[optionName][parameterDataName.toString().toLowerCase()] = newValue;
 							} else {
 								// @ts-ignore
 								requestOptions[optionName][parameterDataName] = newValue;