diff --git a/.eslintrc.js b/.eslintrc.js
index 927283f..e8ede63 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -19,6 +19,7 @@ module.exports = {
   plugins: ['@typescript-eslint', 'import', 'prettier'],
   rules: {
     'no-plusplus': 'off',
+    'class-methods-use-this': 'off',
     'no-bitwise': 'off',
     'no-underscore-dangle': 'off',
     '@typescript-eslint/no-explicit-any': 'off',
diff --git a/src/providers/sources/primewire/blowfish.ts b/src/providers/sources/primewire/blowfish.ts
index fe7dd9b..470de1e 100644
--- a/src/providers/sources/primewire/blowfish.ts
+++ b/src/providers/sources/primewire/blowfish.ts
@@ -254,7 +254,7 @@ class Blowfish {
     }
   }
 
-  block32toNum(e) {
+  block32toNum(e: string) {
     return this.fixNegative(
       (e.charCodeAt(0) << 24) | (e.charCodeAt(1) << 16) | (e.charCodeAt(2) << 8) | e.charCodeAt(3),
     );