diff --git a/src/llmtuner/api/app.py b/src/llmtuner/api/app.py
index 6d06d1d0..21edab2f 100644
--- a/src/llmtuner/api/app.py
+++ b/src/llmtuner/api/app.py
@@ -51,7 +51,7 @@ def create_app(chat_model: "ChatModel") -> "FastAPI":
         allow_methods=["*"],
         allow_headers=["*"],
     )
-    api_key = os.environ.get("API_KEY", None)
+    api_key = os.environ.get("API_KEY")
     security = HTTPBearer(auto_error=False)
 
     async def verify_api_key(auth: Annotated[Optional[HTTPAuthorizationCredentials], Depends(security)]):
diff --git a/src/llmtuner/extras/callbacks.py b/src/llmtuner/extras/callbacks.py
index 6d24b244..637b786d 100644
--- a/src/llmtuner/extras/callbacks.py
+++ b/src/llmtuner/extras/callbacks.py
@@ -53,7 +53,7 @@ class LogCallback(TrainerCallback):
         self.aborted = False
         self.do_train = False
         """ Web UI """
-        self.webui_mode = bool(int(os.environ.get("LLAMABOARD_ENABLED", "0")))
+        self.webui_mode = os.environ.get("LLAMABOARD_ENABLED", "0").lower() in ["true", "1"]
         if self.webui_mode:
             signal.signal(signal.SIGABRT, self._set_abort)
             self.logger_handler = LoggerHandler(output_dir)
diff --git a/src/llmtuner/extras/misc.py b/src/llmtuner/extras/misc.py
index 8ce25d18..53140efa 100644
--- a/src/llmtuner/extras/misc.py
+++ b/src/llmtuner/extras/misc.py
@@ -58,7 +58,7 @@ class AverageMeter:
 
 
 def check_dependencies() -> None:
-    if int(os.environ.get("DISABLE_VERSION_CHECK", "0")):
+    if os.environ.get("DISABLE_VERSION_CHECK", "0").lower() in ["true", "1"]:
         logger.warning("Version checking has been disabled, may lead to unexpected behaviors.")
     else:
         require_version("transformers>=4.37.2", "To fix: pip install transformers>=4.37.2")
diff --git a/src/llmtuner/webui/interface.py b/src/llmtuner/webui/interface.py
index 91709d40..c5a30113 100644
--- a/src/llmtuner/webui/interface.py
+++ b/src/llmtuner/webui/interface.py
@@ -71,12 +71,12 @@ def create_web_demo() -> gr.Blocks:
 
 
 def run_web_ui() -> None:
-    gradio_share = bool(int(os.environ.get("GRADIO_SHARE", "0")))
+    gradio_share = os.environ.get("GRADIO_SHARE", "0").lower() in ["true", "1"]
     server_name = os.environ.get("GRADIO_SERVER_NAME", "0.0.0.0")
     create_ui().queue().launch(share=gradio_share, server_name=server_name)
 
 
 def run_web_demo() -> None:
-    gradio_share = bool(int(os.environ.get("GRADIO_SHARE", "0")))
+    gradio_share = os.environ.get("GRADIO_SHARE", "0").lower() in ["true", "1"]
     server_name = os.environ.get("GRADIO_SERVER_NAME", "0.0.0.0")
     create_web_demo().queue().launch(share=gradio_share, server_name=server_name)
diff --git a/src/webui.py b/src/webui.py
index 3f8690d0..7a43039d 100644
--- a/src/webui.py
+++ b/src/webui.py
@@ -4,7 +4,7 @@ from llmtuner.webui.interface import create_ui
 
 
 def main():
-    gradio_share = bool(int(os.environ.get("GRADIO_SHARE", "0")))
+    gradio_share = os.environ.get("GRADIO_SHARE", "0").lower() in ["true", "1"]
     server_name = os.environ.get("GRADIO_SERVER_NAME", "0.0.0.0")
     create_ui().queue().launch(share=gradio_share, server_name=server_name)