diff --git a/requirements.txt b/requirements.txt
index 4cb76f2..2de234d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-astroid==3.3.11
+astroid==4.0.1
 attrs==25.4.0
 autopep8==2.3.2
 coverage==7.11.0
@@ -15,7 +15,7 @@ platformdirs==4.5.0
 pluggy==1.6.0
 pycodestyle==2.14.0
 pyflakes==3.4.0
-pylint==3.3.9
+pylint==4.0.1
 pyright==1.1.406
 pytest==8.4.2
 pytest-cov==7.0.0
diff --git a/src/projecteuler/helpers/word_score.py b/src/projecteuler/helpers/word_score.py
index 16b6b4d..4a249ed 100644
--- a/src/projecteuler/helpers/word_score.py
+++ b/src/projecteuler/helpers/word_score.py
@@ -1,4 +1,4 @@
-_scoreLetter = {
+SCORE_LETTER = {
     'A': 1,
     'B': 2,
     'C': 3,
@@ -32,7 +32,7 @@ def wordScore(word: str) -> int:
     result = 0
 
     for letter in word:
-        if letter in _scoreLetter:
-            result += _scoreLetter[letter]
+        if letter in SCORE_LETTER:
+            result += SCORE_LETTER[letter]
 
     return result