diff --git a/src/merge_params.ts b/src/merge_params.ts
index 3667a00..69f5f00 100644
--- a/src/merge_params.ts
+++ b/src/merge_params.ts
@@ -1,8 +1,8 @@
 import { ScriptOptions, FlagsObject } from "./scripts_config.ts";
 
 export function mergeParams(
-  parentParams: ScriptOptions,
   childParams: ScriptOptions,
+  parentParams: ScriptOptions,
 ): ScriptOptions {
   return {
     ...parentParams,
diff --git a/src/normalize_script.ts b/src/normalize_script.ts
index 275ed68..836d893 100644
--- a/src/normalize_script.ts
+++ b/src/normalize_script.ts
@@ -30,7 +30,7 @@ function _normalizeScript(
   if (typeof node === "string") {
     return {
       cmd: node.trim(),
-      ...mergeParams(parentParams, {}),
+      ...mergeParams({}, parentParams),
     } as Command;
   }
   if (Array.isArray(node)) {