diff --git a/GPT_SoVITS/inference_webui.py b/GPT_SoVITS/inference_webui.py
index a361ed58..e8c8e20f 100644
--- a/GPT_SoVITS/inference_webui.py
+++ b/GPT_SoVITS/inference_webui.py
@@ -84,10 +84,10 @@ bert_path = os.environ.get("bert_path", "GPT_SoVITS/pretrained_models/chinese-ro
 infer_ttswebui = os.environ.get("infer_ttswebui", 9872)
 infer_ttswebui = int(infer_ttswebui)
 is_share = os.environ.get("is_share", "False")
-is_share = eval(is_share)
+is_share = is_share.lower() in ("true", "1", "yes")
 if "_CUDA_VISIBLE_DEVICES" in os.environ:
     os.environ["CUDA_VISIBLE_DEVICES"] = os.environ["_CUDA_VISIBLE_DEVICES"]
-is_half = eval(os.environ.get("is_half", "True")) and torch.cuda.is_available()
+is_half = os.environ.get("is_half", "True").lower() in ("true", "1", "yes") and torch.cuda.is_available()
 # is_half=False
 punctuation = set(["!", "?", "…", ",", ".", "-", " "])
 import gradio as gr
diff --git a/api.py b/api.py
index cc0896a2..27dc8601 100644
--- a/api.py
+++ b/api.py
@@ -176,9 +176,9 @@ import subprocess
 
 class DefaultRefer:
     def __init__(self, path, text, language):
-        self.path = args.default_refer_path
-        self.text = args.default_refer_text
-        self.language = args.default_refer_language
+        self.path = path
+        self.text = text
+        self.language = language
 
     def is_ready(self) -> bool:
         return is_full(self.path, self.text, self.language)
@@ -1082,11 +1082,11 @@ def handle_change(path, text, language):
             {"code": 400, "message": '缺少任意一项以下参数: "path", "text", "language"'}, status_code=400
         )
 
-    if path != "" or path is not None:
+    if path != "" and path is not None:
         default_refer.path = path
-    if text != "" or text is not None:
+    if text != "" and text is not None:
         default_refer.text = text
-    if language != "" or language is not None:
+    if language != "" and language is not None:
         default_refer.language = language
 
     logger.info(f"当前默认参考音频路径: {default_refer.path}")
diff --git a/api_v2.py b/api_v2.py
index 21511db3..d8cf74fc 100644
--- a/api_v2.py
+++ b/api_v2.py
@@ -481,11 +481,11 @@ async def tts_get_endpoint(
 ):
     req = {
         "text": text,
-        "text_lang": text_lang.lower(),
+        "text_lang": text_lang.lower() if text_lang else "",
         "ref_audio_path": ref_audio_path,
         "aux_ref_audio_paths": aux_ref_audio_paths,
         "prompt_text": prompt_text,
-        "prompt_lang": prompt_lang.lower(),
+        "prompt_lang": prompt_lang.lower() if prompt_lang else "",
         "top_k": top_k,
         "top_p": top_p,
         "temperature": temperature,