diff --git a/src/templates/core/axios/getHeaders.hbs b/src/templates/core/axios/getHeaders.hbs
index e8a4afa38..222f576a5 100644
--- a/src/templates/core/axios/getHeaders.hbs
+++ b/src/templates/core/axios/getHeaders.hbs
@@ -1,8 +1,11 @@
 const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptions, formData?: FormData): Promise<Record<string, string>> => {
-	const token = await resolve(options, config.TOKEN);
-	const username = await resolve(options, config.USERNAME);
-	const password = await resolve(options, config.PASSWORD);
-	const additionalHeaders = await resolve(options, config.HEADERS);
+	const [token, username, password, additionalHeaders] = Promise.all([
+        resolve(options, config.TOKEN),
+        resolve(options, config.USERNAME),
+        resolve(options, config.PASSWORD),
+        resolve(options, config.HEADERS),
+	]);
+
 	const formHeaders = typeof formData?.getHeaders === 'function' && formData?.getHeaders() || {}
 
 	const headers = Object.entries({
diff --git a/src/templates/core/fetch/getHeaders.hbs b/src/templates/core/fetch/getHeaders.hbs
index 41a65005c..02c6392fe 100644
--- a/src/templates/core/fetch/getHeaders.hbs
+++ b/src/templates/core/fetch/getHeaders.hbs
@@ -1,8 +1,10 @@
 const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptions): Promise<Headers> => {
-	const token = await resolve(options, config.TOKEN);
-	const username = await resolve(options, config.USERNAME);
-	const password = await resolve(options, config.PASSWORD);
-	const additionalHeaders = await resolve(options, config.HEADERS);
+	const [token, username, password, additionalHeaders] = Promise.all([
+        resolve(options, config.TOKEN),
+        resolve(options, config.USERNAME),
+        resolve(options, config.PASSWORD),
+        resolve(options, config.HEADERS),
+	]);
 
 	const headers = Object.entries({
 		Accept: 'application/json',
diff --git a/src/templates/core/node/getHeaders.hbs b/src/templates/core/node/getHeaders.hbs
index 80f2cbcce..938934666 100644
--- a/src/templates/core/node/getHeaders.hbs
+++ b/src/templates/core/node/getHeaders.hbs
@@ -1,8 +1,10 @@
 const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptions): Promise<Headers> => {
-	const token = await resolve(options, config.TOKEN);
-	const username = await resolve(options, config.USERNAME);
-	const password = await resolve(options, config.PASSWORD);
-	const additionalHeaders = await resolve(options, config.HEADERS);
+	const [token, username, password, additionalHeaders] = Promise.all([
+        resolve(options, config.TOKEN),
+        resolve(options, config.USERNAME),
+        resolve(options, config.PASSWORD),
+        resolve(options, config.HEADERS),
+	]);
 
 	const headers = Object.entries({
 		Accept: 'application/json',
diff --git a/src/templates/core/xhr/getHeaders.hbs b/src/templates/core/xhr/getHeaders.hbs
index 41a65005c..02c6392fe 100644
--- a/src/templates/core/xhr/getHeaders.hbs
+++ b/src/templates/core/xhr/getHeaders.hbs
@@ -1,8 +1,10 @@
 const getHeaders = async (config: OpenAPIConfig, options: ApiRequestOptions): Promise<Headers> => {
-	const token = await resolve(options, config.TOKEN);
-	const username = await resolve(options, config.USERNAME);
-	const password = await resolve(options, config.PASSWORD);
-	const additionalHeaders = await resolve(options, config.HEADERS);
+	const [token, username, password, additionalHeaders] = Promise.all([
+        resolve(options, config.TOKEN),
+        resolve(options, config.USERNAME),
+        resolve(options, config.PASSWORD),
+        resolve(options, config.HEADERS),
+	]);
 
 	const headers = Object.entries({
 		Accept: 'application/json',