diff --git a/src/scripts/entrypoint.sh b/src/scripts/entrypoint.sh
index 3317d39..71d433e 100644
--- a/src/scripts/entrypoint.sh
+++ b/src/scripts/entrypoint.sh
@@ -23,20 +23,10 @@ for f in /scripts/startup/*.sh; do
 done
 echo "Done with startup"
 
-last_renewal_file="/etc/letsencrypt/last_renewal.txt"
-
 # Instead of trying to run `cron` or something like that, just sleep and run `certbot`.
 while [ true ]; do
-    if is_renewal_required $last_renewal_file; then
-        # Recreate the file to persist the last renewal timestamp
-        touch "$last_renewal_file"
-
-        # Run certbot to request all the ssl certs we can find
-        echo "Run certbot"
-        /scripts/run_certbot.sh
-    else
-        echo "Not run certbot"
-    fi
+    echo "Run certbot"
+    /scripts/run_certbot.sh
 
     # Sleep for 1 week
     sleep 604810 &
diff --git a/src/scripts/util.sh b/src/scripts/util.sh
index d03a0d2..eb0243b 100644
--- a/src/scripts/util.sh
+++ b/src/scripts/util.sh
@@ -76,17 +76,25 @@ get_certificate() {
         --standalone --preferred-challenges http-01 --debug
 }
 
-# Given a last renewal file with timestamp, return true if a renewal is
-# required (last renewal ran over a week ago), return false otherwise
+# Given a domain name, return true if a renewal is required (last renewal
+# ran over a week ago or never happened yet), otherwise return false.
 is_renewal_required() {
     # If the file does not exist assume a renewal is required
-    [[ ! -e "$1" ]] && return;
+    last_renewal_file="/etc/letsencrypt/$1_last_renewal.txt"
+    [[ ! -e "$last_renewal_file" ]] && return;
     
     # If the file exists, check if the last renewal was more than a week ago
     one_week_sec=604800
     now_sec=$(date -d now +%s)
-    last_renewal_sec=$(stat -c %Y "$1")
+    last_renewal_sec=$(stat -c %Y "$last_renewal_file")
     last_renewal_delta_sec=$(( ($now_sec - $last_renewal_sec) ))
     is_finshed_week_sec=$(( ($one_week_sec - $last_renewal_delta_sec) ))
     [[ $is_finshed_week_sec -lt 0 ]]
 }
+
+# Given a domain name, set the current time as the last renewal timestamp
+# as read by is_renewal_required().
+update_renewal_timestamp() {
+    last_renewal_file="/etc/letsencrypt/$1_last_renewal.txt"
+    touch "$last_renewal_file"
+}