diff --git a/app.py b/app.py
index a3d9c29..bdf89fc 100755
--- a/app.py
+++ b/app.py
@@ -1065,9 +1065,19 @@ def generate_captcha():
             draw.point((x, y), fill=(random.randint(0, 200), random.randint(0, 200), random.randint(0, 200)))
 
         # 绘制验证码文字 - 增大字体
-        try:
-            font = ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf", 42)
-        except:
+        font = None
+        font_paths = [
+            "/usr/share/fonts/truetype/liberation/LiberationSans-Bold.ttf",
+            "/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf",
+            "/usr/share/fonts/truetype/freefont/FreeSansBold.ttf",
+        ]
+        for font_path in font_paths:
+            try:
+                font = ImageFont.truetype(font_path, 42)
+                break
+            except:
+                continue
+        if font is None:
             font = ImageFont.load_default()
 
         for i, char in enumerate(code):