diff --git a/Day 20/decode.py b/Day 20/decode.py
index 0051da4..980c818 100644
--- a/Day 20/decode.py	
+++ b/Day 20/decode.py	
@@ -1,5 +1,7 @@
 
-byte_300 = [0xCE, 0x55, 0x95, 0x4E, 0x38, 0x0C5, 0x89, 0x0A5, 0x1B, 0x6F, 0x5E, 0x25, 0x0D2, 0x1D, 0x2A, 0x2B, 0x5E, 0x7B, 0x39, 0x14, 0x8E, 0x0D0, 0x0F0, 0x0F8, 0x0F8, 0x0A5, 0x00]
+byte_300 = [0xCE, 0x55, 0x95, 0x4E, 0x38, 0x0C5, 0x89, 0x0A5, 0x1B, 0x6F, 0x5E, 0x25, 0x0D2, 0x1D, 0x2A, 0x2B, 0x5E, 0x7B, 0x39, 0x14, 0x8E, 0x0D0, 0x0F0, 0x0F8, 0x0F8, 0x0A5]
+
+BUFFER_LENGTH = len(byte_300)
 
 with open("PS4UPDATE.PUP", "rb") as f:
 
@@ -8,12 +10,12 @@ with open("PS4UPDATE.PUP", "rb") as f:
 
     while True:
         f.seek(v14)
-        input = bytes(f.read(27))
-        for i in range(27):
+        input = bytes(f.read(BUFFER_LENGTH))
+        for i in range(BUFFER_LENGTH):
             v29[i] = (v29[i] ^ input[i])
 
         v14 += 4919
-        if v14 == 24201480: # 4920 times
+        if v14 == 24201480: # 4919 times
             break
 
     print("".join(chr(x) for x in v29))