diff --git a/README.md b/README.md
index eac297c97b..2bd8e8dc9a 100644
--- a/README.md
+++ b/README.md
@@ -205,7 +205,7 @@ pip install -e .\[flash_attn\]
 Installation using pip:
 
 ```shell
-pip install trinity-rft==0.2.0
+pip install trinity-rft==0.2.1
 # install flash-attn separately
 pip install flash-attn==2.8.0.post2
 ```
diff --git a/README_zh.md b/README_zh.md
index b65dae1006..7960de4555 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -204,7 +204,7 @@ pip install -e .\[flash_attn\]
 使用 pip 安装：
 
 ```shell
-pip install trinity-rft==0.2.0
+pip install trinity-rft==0.2.1
 # flash-attn 需要单独安装
 pip install flash-attn==2.8.0.post2
 ```
diff --git a/docs/sphinx_doc/source/main.md b/docs/sphinx_doc/source/main.md
index f5555d4a37..f83e9a812d 100644
--- a/docs/sphinx_doc/source/main.md
+++ b/docs/sphinx_doc/source/main.md
@@ -177,7 +177,7 @@ pip install -e .\[flash_attn\]
 Installation using pip:
 
 ```shell
-pip install trinity-rft==0.2.0
+pip install trinity-rft==0.2.1
 ```
 
 Installation from docker:
diff --git a/pyproject.toml b/pyproject.toml
index 431410ad51..413917d923 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name =  "trinity-rft"
-version = "0.2.1.dev0"
+version = "0.2.1"
 authors = [
     {name="Trinity-RFT Team", email="trinity-rft@outlook.com"},
 ]
diff --git a/trinity/cli/launcher.py b/trinity/cli/launcher.py
index e61a59d037..16c90e85d3 100644
--- a/trinity/cli/launcher.py
+++ b/trinity/cli/launcher.py
@@ -187,7 +187,7 @@ def run(config_path: str, dlc: bool = False, plugin_dir: str = None):
             config_path,
         )
 
-    envs = {PLUGIN_DIRS_ENV_VAR: plugin_dir}
+    envs = {PLUGIN_DIRS_ENV_VAR: plugin_dir or ""}
     if dlc:
         from trinity.utils.dlc_utils import setup_ray_cluster