diff --git a/aws_lambda_builders/workflows/nodejs_npm_esbuild/esbuild.py b/aws_lambda_builders/workflows/nodejs_npm_esbuild/esbuild.py
index 173d22e67..97acd7f0e 100644
--- a/aws_lambda_builders/workflows/nodejs_npm_esbuild/esbuild.py
+++ b/aws_lambda_builders/workflows/nodejs_npm_esbuild/esbuild.py
@@ -116,11 +116,7 @@ def run(self, args, cwd=None):
 ]
 
 # Multi-value types (--external:axios --external:aws-sdk)
-SUPPORTED_ESBUILD_APIS_MULTI_VALUE = [
-    "external",
-    "loader",
-    "out_extension",
-]
+SUPPORTED_ESBUILD_APIS_MULTI_VALUE = ["external", "loader", "out_extension", "banner"]
 
 
 class EsbuildCommandBuilder:
diff --git a/tests/unit/workflows/nodejs_npm_esbuild/test_esbuild.py b/tests/unit/workflows/nodejs_npm_esbuild/test_esbuild.py
index 624cef36e..6181f9f8d 100644
--- a/tests/unit/workflows/nodejs_npm_esbuild/test_esbuild.py
+++ b/tests/unit/workflows/nodejs_npm_esbuild/test_esbuild.py
@@ -226,7 +226,14 @@ def test_builds_args_from_config(self, osutils_mock):
 
     @patch("aws_lambda_builders.workflows.nodejs_npm.utils.OSUtils")
     def test_combined_builder_with_dependencies(self, osutils_mock):
-        bundler_config = {"entry_points": ["x.js"], "loader": [".proto=text", ".json=js"], "format": "esm"}
+        bundler_config = {
+            "entry_points": ["x.js"],
+            "loader": [".proto=text", ".json=js"],
+            "format": "esm",
+            "banner": [
+                "js=\"import { createRequire } from 'module'; const require = createRequire(import.meta.url);\""
+            ],
+        }
         args = (
             EsbuildCommandBuilder("scratch", "artifacts", bundler_config, osutils_mock, "")
             .build_entry_points()
@@ -246,6 +253,7 @@ def test_combined_builder_with_dependencies(self, osutils_mock):
                 "--format=esm",
                 "--loader:.proto=text",
                 "--loader:.json=js",
+                "--banner:js=\"import { createRequire } from 'module'; const require = createRequire(import.meta.url);\"",
             ],
         )