diff --git a/slpkg/binaries/install.py b/slpkg/binaries/install.py
index f9b1cd99..f6b74f9f 100644
--- a/slpkg/binaries/install.py
+++ b/slpkg/binaries/install.py
@@ -4,6 +4,7 @@
 import os
 import time
 import subprocess
+from collections import OrderedDict
 from multiprocessing import Process
 
 from slpkg.configs import Configs
@@ -78,8 +79,6 @@ class Packages(Configs):
 
     def dependencies(self):
         """ Creating the dependencies list and the order for install. """
-        requires: list = []
-
         if not self.utils.is_option(self.flag_resolve_off, self.flags):
 
             for pkg in self.packages:
@@ -92,11 +91,7 @@ class Packages(Configs):
                 self.packages_requires += Required(self.data, pkg, self.repo).resolve()
 
             # Clean dependencies from the dependencies list if already added with main packages.
-            for req in self.packages_requires:
-                if req not in self.packages:
-                    requires.append(req)
-
-            requires = list(set(requires))
+            requires = list(OrderedDict.fromkeys(self.packages_requires))
 
             if requires:
                 self.packages_requires = self.choose_dependencies(requires)