diff --git a/bash/apt.sh b/bash/apt.sh
index 36bd5d6..ce43f1a 100644
--- a/bash/apt.sh
+++ b/bash/apt.sh
@@ -1,3 +1,10 @@
 apt_clean() {
-	apt-get clean
+	apt-get \
+		clean
+}
+
+apt_upgrade() {
+	apt-get \
+		upgrade \
+		--assume-yes
 }
diff --git a/bash/rescue.sh b/bash/rescue.sh
index 05ecac8..34f1881 100644
--- a/bash/rescue.sh
+++ b/bash/rescue.sh
@@ -72,7 +72,7 @@ rescue_install() {
 	# disable frontend
 	debian_disable_frontend
 	# upgrade packages
-	apt-get upgrade --assume-yes
+	apt_upgrade
 	# clean cache
 	apt_clean
 	# install packages