diff --git a/package.json b/package.json
index b2c221c..9e13a46 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@wrtnio/schema",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "description": "JSON and LLM function calling schemas extended for Wrtn Studio Pro",
   "main": "lib/index.js",
   "module": "./lib/index.mjs",
@@ -31,7 +31,7 @@
   },
   "homepage": "https://github.com/wrtnio/schema#readme",
   "dependencies": {
-    "@samchon/openapi": "^2.0.0"
+    "@samchon/openapi": "^2.0.3"
   },
   "devDependencies": {
     "@nestia/core": "^4.0.0",
@@ -45,10 +45,12 @@
     "@rollup/plugin-typescript": "^11.1.6",
     "@trivago/prettier-plugin-sort-imports": "^4.3.0",
     "@types/multer": "^1.4.12",
+    "chalk": "4.1.2",
     "multer": "^1.4.5-lts.1",
     "prettier": "^3.3.3",
     "rimraf": "^6.0.1",
     "rollup": "^4.22.0",
+    "source-map-support": "^0.5.21",
     "ts-patch": "^3.2.1",
     "typescript": "5.5.4",
     "typescript-transform-paths": "^3.5.2",
diff --git a/src/internal/HttpOpenAiSeparator.ts b/src/internal/HttpOpenAiSeparator.ts
index 1792279..fd01e1d 100644
--- a/src/internal/HttpOpenAiSeparator.ts
+++ b/src/internal/HttpOpenAiSeparator.ts
@@ -60,11 +60,6 @@ export namespace HttpOpenAiSeparator {
     (
       input: IOpenAiSchema.IObject,
     ): [IOpenAiSchema.IObject | null, IOpenAiSchema.IObject | null] => {
-      if (
-        !!input.additionalProperties ||
-        Object.keys(input.properties ?? {}).length === 0
-      )
-        return [input, null];
       const llm = {
         ...input,
         properties: {} as Record<string, IOpenAiSchema>,
@@ -78,6 +73,14 @@ export namespace HttpOpenAiSeparator {
         if (x !== null) llm.properties[key] = x;
         if (y !== null) human.properties[key] = y;
       }
+      if (
+        typeof input.additionalProperties === "object" &&
+        input.additionalProperties !== null
+      ) {
+        const [dx, dy] = schema(predicator)(input.additionalProperties);
+        llm.additionalProperties = dx ?? false;
+        human.additionalProperties = dy ?? false;
+      }
       return [
         Object.keys(llm.properties).length === 0 ? null : shrinkRequired(llm),
         Object.keys(human.properties).length === 0
diff --git a/test/features/test_http_llm_merge_parameters.ts b/test/features/test_http_llm_merge_parameters.ts
new file mode 100644
index 0000000..258db25
--- /dev/null
+++ b/test/features/test_http_llm_merge_parameters.ts
@@ -0,0 +1,47 @@
+import { TestValidator } from "@nestia/e2e";
+import { IHttpOpenAiFunction, IOpenAiSchema } from "@wrtnio/schema";
+import { LlmDataMerger } from "@wrtnio/schema/lib/internal/HttpOpenAiMerger";
+
+export const test_http_llm_merge_parameters = (): void => {
+  const p = LlmDataMerger.parameters({
+    function: {
+      parameters: [
+        {
+          type: "array",
+          items: {},
+        },
+      ] satisfies IOpenAiSchema[],
+      separated: {
+        human: [
+          {
+            index: 0,
+            schema: {
+              type: "array",
+              items: {},
+            },
+          },
+        ],
+        llm: [
+          {
+            index: 0,
+            schema: {
+              type: "array",
+              items: {},
+            },
+          },
+        ],
+      } satisfies IHttpOpenAiFunction.ISeparated,
+    } as IHttpOpenAiFunction,
+    llm: [],
+    human: [
+      {
+        a: 1,
+      },
+    ],
+  });
+  TestValidator.equals(p as any)([
+    {
+      a: 1,
+    },
+  ]);
+};
diff --git a/test/features/test_http_llm_separate_parameters.ts b/test/features/test_http_llm_separate_parameters.ts
new file mode 100644
index 0000000..a6b4b51
--- /dev/null
+++ b/test/features/test_http_llm_separate_parameters.ts
@@ -0,0 +1,31 @@
+import { TestValidator } from "@nestia/e2e";
+import { OpenApi } from "@samchon/openapi";
+import { HttpOpenAi, OpenAiTypeChecker } from "@wrtnio/schema";
+import typia from "typia";
+
+export const test_http_llm_separate_parameters = async (): Promise<void> => {
+  const document: OpenApi.IDocument = typia.assert<OpenApi.IDocument>(
+    await fetch(
+      "https://wrtnio.github.io/connectors/swagger/swagger.json",
+    ).then((r) => r.json()),
+  );
+  for (const path of Object.keys(document.paths ?? {}))
+    if (path !== "/connector/notion/database-item/{databaseId}")
+      delete document.paths?.[path];
+
+  const app = HttpOpenAi.application({
+    document,
+    options: {
+      separate: (schema) =>
+        OpenAiTypeChecker.isString(schema) &&
+        schema["x-wrtn-secret-key"] !== undefined,
+    },
+  });
+  const func = app.functions.find(
+    (f) =>
+      f.method === "post" &&
+      f.path === "/connector/notion/database-item/{databaseId}",
+  );
+  if (func === undefined) throw new Error("Function not found");
+  TestValidator.equals("human")(func.separated?.human.at(0)?.index)(1);
+};