diff --git a/modoboa_installer/package.py b/modoboa_installer/package.py
index 2f2f3a2..5354b35 100644
--- a/modoboa_installer/package.py
+++ b/modoboa_installer/package.py
@@ -46,7 +46,7 @@ class DEBPackage(Package):
         """Update local cache."""
         if self.index_updated:
             return
-        utils.exec_cmd("apt-get update --quiet")
+        utils.exec_cmd("apt-get -o Dpkg::Progress-Fancy=0 update --quiet")
         self.index_updated = True
 
     def preconfigure(self, name, question, qtype, answer):
@@ -57,12 +57,12 @@ class DEBPackage(Package):
     def install(self, name):
         """Install a package."""
         self.update()
-        utils.exec_cmd("apt-get install --quiet --assume-yes {}".format(name))
+        utils.exec_cmd("apt-get -o Dpkg::Progress-Fancy=0 install --quiet --assume-yes {}".format(name))
 
     def install_many(self, names):
         """Install many packages."""
         self.update()
-        return utils.exec_cmd("apt-get install --quiet --assume-yes {}".format(
+        return utils.exec_cmd("apt-get -o Dpkg::Progress-Fancy=0 install --quiet --assume-yes {}".format(
             " ".join(names)))
 
     def get_installed_version(self, name):
diff --git a/modoboa_installer/python.py b/modoboa_installer/python.py
index 98390c5..4f319cc 100644
--- a/modoboa_installer/python.py
+++ b/modoboa_installer/python.py
@@ -64,7 +64,7 @@ def get_package_version(name, venv=None, **kwargs):
     version_list_clean = []
     for element in version_list:
         try:
-            version_list_clean.append(int(version_list[i]))
+            version_list_clean.append(int(element))
         except ValueError:
             utils.printcolor(
                 f"Failed to decode some part of the version of {name}",