diff --git a/aws_lambda_builders/workflows/nodejs_npm_esbuild/esbuild.py b/aws_lambda_builders/workflows/nodejs_npm_esbuild/esbuild.py
index 345580fe0..209727720 100644
--- a/aws_lambda_builders/workflows/nodejs_npm_esbuild/esbuild.py
+++ b/aws_lambda_builders/workflows/nodejs_npm_esbuild/esbuild.py
@@ -102,6 +102,7 @@ def run(self, args, cwd=None):
 
 
 # The esbuild API flags are broken up into three forms (https://esbuild.github.io/api/):
+# Multi-word arguments are expected to be passed down using snake case e.g. entry_points
 # Boolean types (--minify)
 SUPPORTED_ESBUILD_APIS_BOOLEAN = [
     "minify",
@@ -112,7 +113,7 @@ def run(self, args, cwd=None):
 SUPPORTED_ESBUILD_APIS_SINGLE_VALUE = [
     "target",
     "format",
-    "main-fields",
+    "main_fields",
 ]
 
 # Multi-value types (--external:axios --external:aws-sdk)
@@ -236,7 +237,7 @@ def _get_boolean_args(self) -> List[str]:
         args = []
         for param in SUPPORTED_ESBUILD_APIS_BOOLEAN:
             if param in self._bundler_config and self._bundler_config[param] is True:
-                args.append(f"--{param}")
+                args.append(f"--{self._convert_snake_to_kebab_case(param)}")
         return args
 
     def _get_single_value_args(self) -> List[str]:
@@ -250,7 +251,7 @@ def _get_single_value_args(self) -> List[str]:
         for param in SUPPORTED_ESBUILD_APIS_SINGLE_VALUE:
             if param in self._bundler_config:
                 value = self._bundler_config.get(param)
-                args.append(f"--{param}={value}")
+                args.append(f"--{self._convert_snake_to_kebab_case(param)}={value}")
         return args
 
     def _get_multi_value_args(self) -> List[str]:
@@ -267,7 +268,7 @@ def _get_multi_value_args(self) -> List[str]:
                 if not isinstance(values, list):
                     raise EsbuildCommandError(f"Invalid type for property {param}, must be a dict.")
                 for param_item in values:
-                    args.append(f"--{param}:{param_item}")
+                    args.append(f"--{self._convert_snake_to_kebab_case(param)}:{param_item}")
         return args
 
     def _get_explicit_file_type(self, entry_point, entry_path):
@@ -296,3 +297,14 @@ def _get_explicit_file_type(self, entry_point, entry_path):
                 return entry_point + ext
 
         raise ActionFailedError("entry point {} does not exist".format(entry_path))
+
+    @staticmethod
+    def _convert_snake_to_kebab_case(arg: str) -> str:
+        """
+        The configuration properties passed down to Lambda Builders are done so using snake case
+        e.g. "main_fields" but esbuild expects them using kebab-case "main-fields"
+
+        :rtype: str
+        :return: mutated string to match the esbuild argument format
+        """
+        return arg.replace("_", "-")
diff --git a/tests/unit/workflows/nodejs_npm_esbuild/test_esbuild.py b/tests/unit/workflows/nodejs_npm_esbuild/test_esbuild.py
index 22b2ef43d..f38b81b8f 100644
--- a/tests/unit/workflows/nodejs_npm_esbuild/test_esbuild.py
+++ b/tests/unit/workflows/nodejs_npm_esbuild/test_esbuild.py
@@ -200,7 +200,7 @@ def test_builds_args_from_config(self, osutils_mock):
             "target": "node14",
             "loader": [".proto=text", ".json=js"],
             "external": ["aws-sdk", "axios"],
-            "main-fields": "module,main",
+            "main_fields": "module,main",
         }
 
         args = (
@@ -246,3 +246,14 @@ def test_combined_builder_with_dependencies(self, osutils_mock):
                 "--loader:.json=js",
             ],
         )
+
+    @parameterized.expand(
+        [
+            ("main_fields", "main-fields"),
+            ("entry_points", "entry-points"),
+            ("main-fields", "main-fields"),
+            ("bundle", "bundle"),
+        ]
+    )
+    def test_convert_snake_case_to_kebab_case(self, field, expected):
+        self.assertEqual(EsbuildCommandBuilder._convert_snake_to_kebab_case(field), expected)