diff --git a/pacroller.service b/pacroller.service
new file mode 100644
index 0000000..0500b2a
--- /dev/null
+++ b/pacroller.service
@@ -0,0 +1,8 @@
+[Unit]
+Description=Unattended upgrade for archlinux
+After=network-online.target
+
+[Service]
+User=root
+Type=simple
+ExecStart=/usr/bin/pacroller run
diff --git a/pacroller.timer b/pacroller.timer
new file mode 100644
index 0000000..f8ca0af
--- /dev/null
+++ b/pacroller.timer
@@ -0,0 +1,9 @@
+[Unit]
+Description=Scheduled unattended upgrade for archlinux
+
+[Timer]
+OnCalendar=*-*-* 12:00:00
+RandomizedDelaySec=15m
+
+[Install]
+WantedBy=timers.target
diff --git a/setup.py b/setup.py
index 5eae905..d2a1d8f 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@ setuptools.setup(
     version="0.0.1",
     author="Jerry Xiao",
     author_email="pacroller@mail.jerryxiao.cc",
-    description="unattended pacman upgrade for archlinux",
+    description="unattended upgrade for archlinux",
     long_description=long_description,
     long_description_content_type="text/markdown",
     url="https://github.com/isjerryxiao/pacroller",