diff --git a/get-best-mirrors.sh b/get-best-mirrors.sh
index f3e0127..96c95fd 100644
--- a/get-best-mirrors.sh
+++ b/get-best-mirrors.sh
@@ -2,6 +2,33 @@
 
 # This is a simple script to fetch and update Arch and EndeavourOS mirrors
 # using rate-mirrors.
+# Syntax get-best-mirrors.sh <arch|eos|both> (nothing means both)
+# I run it weekly using anacron.
+
+update_arch() {
+    # Rank Arch mirrors
+    echo "===================================================================================================="
+    echo "Ranking Arch mirrors"
+    echo "===================================================================================================="
+
+    rate-mirrors --protocol=https --save=$TMPFILE_ARCH arch
+    sudo mv /etc/pacman.d/mirrorlist /etc/pacman.d/mirrorlist-backup/mirrorlist.$TIME
+    sudo mv $TMPFILE_ARCH /etc/pacman.d/mirrorlist
+}
+
+update_eos() {
+    # Remove files created by eos-rankmirror, if any
+    sudo find /etc/pacman.d/ -maxdepth 1 -type f -name "endeavouros-mirrorlist\.*" -exec rm -v {} \;
+
+    # Rank EndeavourOS mirrors
+    echo $'\n'"===================================================================================================="
+    echo "Ranking EndeavourOS mirrors"
+    echo "===================================================================================================="
+
+    rate-mirrors --protocol=https --save=$TMPFILE_EOS endeavouros
+    sudo mv /etc/pacman.d/endeavouros-mirrorlist /etc/pacman.d/mirrorlist-backup/endeavouros-mirrorlist.$TIME
+    sudo mv $TMPFILE_EOS /etc/pacman.d/endeavouros-mirrorlist
+}
 
 # Create temporary files to output to
 TMPFILE_ARCH="$(mktemp)"
@@ -13,26 +40,14 @@ TIME="$(date '+%Y.%m.%d-%H.%M.%S')"
 # Create backup directory if not present already
 sudo mkdir -p /etc/pacman.d/mirrorlist-backup
 
-# Remove files created by eos-rankmirror, if any
-sudo find /etc/pacman.d/ -maxdepth 1 -type f -name "endeavouros-mirrorlist\.*" -exec rm -v {} \;
-
-# Rank Arch mirrors
-echo "===================================================================================================="
-echo "Ranking Arch mirrors"
-echo "===================================================================================================="
-
-rate-mirrors --protocol=https --save=$TMPFILE_ARCH arch
-sudo mv /etc/pacman.d/mirrorlist /etc/pacman.d/mirrorlist-backup/mirrorlist.$TIME
-sudo mv $TMPFILE_ARCH /etc/pacman.d/mirrorlist
-
-# Rank EndeavourOS mirrors
-echo $'\n'"===================================================================================================="
-echo "Ranking EndeavourOS mirrors"
-echo "===================================================================================================="
-
-rate-mirrors --protocol=https --save=$TMPFILE_EOS endeavouros
-sudo mv /etc/pacman.d/endeavouros-mirrorlist /etc/pacman.d/mirrorlist-backup/endeavouros-mirrorlist.$TIME
-sudo mv $TMPFILE_EOS /etc/pacman.d/endeavouros-mirrorlist
+if [ "$1" == "arch" ]; then
+    update_arch
+elif [ "$1" == "eos" ]; then
+    update_eos
+else
+    update_arch
+    update_eos
+fi
 
 # Do some cleanup, keep only the last 3 backups
 echo $'\n'"===================================================================================================="