diff --git a/slpkg/upgrade.py b/slpkg/upgrade.py
index 929d8fa5..737dd2c1 100644
--- a/slpkg/upgrade.py
+++ b/slpkg/upgrade.py
@@ -7,11 +7,11 @@ from slpkg.blacklist import Blacklist
 from slpkg.dependencies import Requires
 
 
-class Upgrade(Utilities):
+class Upgrade:
     """ Upgrade the installed packages. """
 
     def __init__(self):
-        super(Utilities, self).__init__()
+        self.utils = Utilities()
 
     def packages(self):
         """ Compares version of packages and returns the maximum. """
@@ -19,14 +19,14 @@ class Upgrade(Utilities):
         black = Blacklist().get()
         upgrade, requires = [], []
 
-        installed = self.all_installed()
+        installed = self.utils.all_installed()
 
         for pkg in installed:
-            inst_pkg_name = self.split_installed_pkg(pkg)[0]
+            inst_pkg_name = self.utils.split_installed_pkg(pkg)[0]
 
             if inst_pkg_name not in black and inst_pkg_name in repo_packages:
 
-                if self.is_repo_version_bigger(inst_pkg_name):
+                if self.utils.is_repo_version_bigger(inst_pkg_name):
                     requires += Requires(inst_pkg_name).resolve()
                     upgrade.append(inst_pkg_name)