diff --git a/_files/app.py b/_files/app.py
index 3ebbae6..19d81d8 100644
--- a/_files/app.py
+++ b/_files/app.py
@@ -28,7 +28,7 @@ def generate_substitution_cipher(flag):
         ' ': ' '  # 保持空格不变
     }
     
-    substitution_rules.append("The quick brown fox jumps a lazy dog.")
+    substitution_rules.append("Pack my box with five dozen liquor jugs.")
     encrypted_rules = []
     for rule in substitution_rules:
         for char in rule:
diff --git a/_files/cli.py b/_files/cli.py
index 684e977..83642f6 100644
--- a/_files/cli.py
+++ b/_files/cli.py
@@ -26,7 +26,7 @@ def generate_substitution_cipher(flag):
         ' ': ' '  # 保持空格不变
     }
     
-    substitution_rules.append("The quick brown fox jumps a lazy dog.")
+    substitution_rules.append("Pack my box with five dozen liquor jugs.")
     encrypted_rules = []
     for rule in substitution_rules:
         for char in rule: