diff --git a/debian/install b/debian/install
index 243be76..20a2eb7 100644
--- a/debian/install
+++ b/debian/install
@@ -1,2 +1,6 @@
 ubports-qa /usr/bin
+pkginstall /usr/bin
+pkgcheck /usr/bin
+pkgremove /usr/bin
+pkgupdate /usr/bin
 ubports-qa_completion /etc/bash_completion.d
diff --git a/pkgcheck b/pkgcheck
new file mode 100755
index 0000000..bd61d79
--- /dev/null
+++ b/pkgcheck
@@ -0,0 +1,16 @@
+#!/bin/bash
+branch="$1"
+arch=$(dpkg --print-architecture)
+
+case "${branch}" in
+	"xenial"*) repo="repo.ubports.com";;
+	*) repo="repo2.ubports.com";;
+esac
+
+while read pkg
+do
+	status=$(apt-cache policy $pkg|awk '/Installed/{print $2}')
+	if [[ -n "${status}" && "$status" != "(none)" ]]; then
+		echo -n "${pkg} "
+	fi
+done < <(awk '/Package/{print $2}' /var/lib/apt/lists/${repo}_dists_${branch//_/%5f}_main_binary-${arch}_Packages|uniq)
diff --git a/pkginstall b/pkginstall
new file mode 100755
index 0000000..6603521
--- /dev/null
+++ b/pkginstall
@@ -0,0 +1,4 @@
+#!/bin/bash
+branch="$1"
+pkgs=$(pkgcheck "$branch")
+apt-get install $pkgs
diff --git a/pkgremove b/pkgremove
new file mode 100755
index 0000000..a8a16ac
--- /dev/null
+++ b/pkgremove
@@ -0,0 +1,5 @@
+#!/bin/bash
+branch="$1"
+pkgs=$(pkgcheck "${branch}")
+apt-get update
+apt-get install $pkgs
diff --git a/pkgupdate b/pkgupdate
new file mode 100755
index 0000000..936c3f4
--- /dev/null
+++ b/pkgupdate
@@ -0,0 +1,10 @@
+#!/bin/bash
+while read list
+do
+	list=$(basename "${list}")
+	if [[ "${list}" != "ubports.list" && "${list}" != "ubports-android9.list" ]]; then
+		list="${list/ubports-/}"
+		pkgs=$(pkgcheck "${list/.list/}")" "${pkgs}
+	 fi
+done < <(ls /etc/apt/sources.list.d/*)
+apt-get install ${pkgs}
diff --git a/ubports-qa b/ubports-qa
index 457abec..7557a97 100755
--- a/ubports-qa
+++ b/ubports-qa
@@ -83,14 +83,26 @@ def apt_update():
         LOG.error("Failed to run 'apt update'. See the output above for details.")
 
 
-def apt_upgrade():
-    LOG.debug("Running 'apt full-upgrade'.")
+def apt_remove(repository):
+    LOG.debug("Downgrading packages")
     try:
-        subprocess.run(["apt", "full-upgrade"], check=True)
-        subprocess.run(["apt", "autoremove"], check=True)
+        subprocess.run(["pkgremove", repository], check=True)
     except subprocess.CalledProcessError:
-        LOG.error("Failed to run 'apt full-upgrade'. See the output above for details.")
+        LOG.error("Failed to downgrade packages. See the output above for details.")
 
+def apt_install(repository_name):
+    LOG.debug("Upgrading packages")
+    try:
+        subprocess.run(["pkginstall", repository_name], check=True)
+    except subprocess.CalledProcessError:
+        LOG.error("Failed to upgrade Packages. See the output above for details.")
+    
+def apt_upgrade_all():
+    LOG.debug("Upgrading all qa package")
+    try:
+        subprocess.run(["pkgupdate"], check=True)
+    except subprocess.CalledProcessError:
+        LOG.error("Failed to install Package. See the output above for details.")
 
 def get_list_file(branch):
     list_file = "/etc/apt/sources.list.d/ubports-{}.list".format(branch)
@@ -220,7 +232,7 @@ def install_command(args):
         add_list(repository_name)
         add_pref(repository_name)
         apt_update()
-        apt_upgrade()
+        apt_install(repository_name)
 
     LOG.info(
         "You can remove this repository by running 'sudo ubports-qa remove {}'".format(
@@ -238,8 +250,7 @@ def remove_command(args):
     with WritableRootFS():
         remove_list(repository)
         remove_pref(repository)
-        apt_update()
-        apt_upgrade()
+        apt_remove(repository)
 
 
 def list_command(args):
@@ -251,7 +262,7 @@ def update_command(args):
     """Update all packages using apt"""
     with WritableRootFS():
         apt_update()
-        apt_upgrade()
+        apt_upgrade_all()
 
 
 parser = argparse.ArgumentParser(