diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b9a1a7e..6b6d9b9 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,7 +15,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v2.2.2
         with:
-          python-version: 3.5
+          python-version: 3.11
       - run: pip install --upgrade pip aheui
       - run: bash test.sh --disable logo
         env:
diff --git a/_tools/aheuilize/aheuilize.py b/_tools/aheuilize/aheuilize.py
index 0b0707b..df32b1a 100644
--- a/_tools/aheuilize/aheuilize.py
+++ b/_tools/aheuilize/aheuilize.py
@@ -1,11 +1,13 @@
 import math
 
+
 def divide(a):
     b = int(a / 2)
     if a % 2 == 1:
         return [b, b + 1]
     return [b, b]
 
+
 def factorization(a):
     primes = []
     factor = 2
@@ -18,6 +20,7 @@ def factorization(a):
         a = int(a / factor)
     return primes
 
+
 def compress_factors(a):
     is_first_2 = True
     is_first_3 = True
@@ -47,6 +50,7 @@ def compress_factors(a):
         result.append(3)
     return result
 
+
 def is_prime(a):
     sqrt = int(math.sqrt(a))
     if a < 2:
@@ -56,6 +60,7 @@ def is_prime(a):
         i += 1
     return sqrt + 1 == i
 
+
 def number2Aheui(a):
     cnt = -1
     result = ""
@@ -78,8 +83,9 @@ def number2Aheui(a):
             result += "따"
         return result
 
+
 def trace2Aheui(a):
     result = ""
     for i in range(len(a)):
-        result += number2Aheui(ord(a[i]))+"맣"
+        result += number2Aheui(ord(a[i])) + "맣"
     return result