diff --git a/slpkg/binary/install.py b/slpkg/binary/install.py
index 9852d432..aad5cf1d 100644
--- a/slpkg/binary/install.py
+++ b/slpkg/binary/install.py
@@ -63,6 +63,7 @@ class BinaryInstall:
         self.yellow = _meta_.color['YELLOW']
         self.endc = _meta_.color["ENDC"]
         self.msg = Msg()
+        self.utils = Utils()
         self.version = self.meta.slack_rel
         self.tmp_path = self.meta.slpkg_tmp_packages
         self.init_flags()
@@ -159,10 +160,10 @@ class BinaryInstall:
                         self.msg.template(78)
                 if "--download-only" in self.flag:
                     raise SystemExit()
-                self.dep_install = Utils().check_downloaded(
-                    self.tmp_path, self.dep_install)
-                self.install = Utils().check_downloaded(
-                    self.tmp_path, self.install)
+                self.dep_install = list(self.utils.check_downloaded(
+                    self.tmp_path, self.dep_install))
+                self.install = list(self.utils.check_downloaded(
+                    self.tmp_path, self.install))
                 ins, upg = self.install_packages()
                 self.msg.reference(ins, upg)
                 write_deps(self.deps_dict)
@@ -188,8 +189,8 @@ class BinaryInstall:
         lowercase
         """
         if "--case-ins" in self.flag:
-            data = list(Utils().package_name(self.PACKAGES_TXT))
-            data_dict = Utils().case_sensitive(data)
+            data = list(self.utils.package_name(self.PACKAGES_TXT))
+            data_dict = self.utils.case_sensitive(data)
             for pkg in self.packages:
                 index = self.packages.index(pkg)
                 for key, value in data_dict.items():
@@ -200,7 +201,7 @@ class BinaryInstall:
         """Update dependencies dictionary with all package
         """
         for dep in self.dependencies:
-            deps = Utils().dimensional_list(Dependencies(
+            deps = self.utils.dimensional_list(Dependencies(
                 self.repo, self.blacklist).binary(
                     dep, self.flag))
             self.deps_dict[dep] = deps
@@ -210,7 +211,7 @@ class BinaryInstall:
         or if added to install two or more times
         """
         packages = []
-        for mas in Utils().remove_dbs(self.packages):
+        for mas in self.utils.remove_dbs(self.packages):
             if mas not in self.dependencies:
                 packages.append(mas)
         self.packages = packages
@@ -264,11 +265,11 @@ class BinaryInstall:
             self.msg.resolving()
         for dep in self.packages:
             dependencies = []
-            dependencies = Utils().dimensional_list(Dependencies(
+            dependencies = self.utils.dimensional_list(Dependencies(
                 self.repo, self.blacklist).binary(dep, self.flag))
             requires += list(self._fix_deps_repos(dependencies))
-            self.deps_dict[dep] = Utils().remove_dbs(requires)
-        return Utils().remove_dbs(requires)
+            self.deps_dict[dep] = self.utils.remove_dbs(requires)
+        return self.utils.remove_dbs(requires)
 
     def _fix_deps_repos(self, dependencies):
         """Fix store deps include in repository
diff --git a/slpkg/slack/patches.py b/slpkg/slack/patches.py
index 01eafe38..b02861c9 100644
--- a/slpkg/slack/patches.py
+++ b/slpkg/slack/patches.py
@@ -110,8 +110,8 @@ class Patches:
             if self.msg.answer() in ["y", "Y"]:
                 Download(self.patch_path, self.dwn_links,
                          repo="slack").start()
-                self.upgrade_all = self.utils.check_downloaded(
-                    self.patch_path, self.upgrade_all)
+                self.upgrade_all = list(self.utils.check_downloaded(
+                    self.patch_path, self.upgrade_all))
                 self.upgrade()
                 self.kernel()
                 if self.meta.slackpkg_log in ["on", "ON"]:
diff --git a/slpkg/utils.py b/slpkg/utils.py
index fe4dedb1..630ac0b2 100644
--- a/slpkg/utils.py
+++ b/slpkg/utils.py
@@ -74,11 +74,9 @@ class Utils:
         """Check if files downloaded and return downloaded
         packages
         """
-        downloaded = []
         for pkg in maybe_downloaded:
-            if os.path.isfile(path + pkg):
-                downloaded.append(pkg)
-        return downloaded
+            if os.path.isfile(f"{path}{pkg}"):
+                yield pkg
 
     def read_config(self, config):
         """Read config file and returns first uncomment line
@@ -103,7 +101,7 @@ class Utils:
         """Checking the file encoding default is utf-8
         """
         try:
-            with open(path + f, "r") as ftest:
+            with open(f"{path}{f}", "r") as ftest:
                 ftest.read()
         except UnicodeDecodeError:
             return "ISO-8859-1"
diff --git a/slpkg/version.py b/slpkg/version.py
index e45b2b81..734468d7 100644
--- a/slpkg/version.py
+++ b/slpkg/version.py
@@ -22,20 +22,15 @@
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 
-from slpkg.__metadata__ import MetaData as _meta_
+from slpkg.__metadata__ import MetaData as m
 
 
 def prog_version():
     """Print version, license and email
     """
-    print("Version   : {0}\n"
-          "Licence   : {1}\n"
-          "Email     : {2}\n"
-          "Homepage  : {3}\n"
-          "Twitter   : {4}\n"
-          "Maintainer: {5}".format(_meta_.__version__,
-                                   _meta_.__license__,
-                                   _meta_.__email__,
-                                   _meta_.__homepage__,
-                                   _meta_.__twitter__,
-                                   _meta_.__maintainer__))
+    print(f"Version   : {m.__version__}\n"
+          f"Licence   : {m.__license__}\n"
+          f"Email     : {m.__email__}\n"
+          f"Homepage  : {m.__homepage__}\n"
+          f"Twitter   : {m.__twitter__}\n"
+          f"Maintainer: {m.__maintainer__}")