diff --git a/README.md b/README.md
index 0208e72..1c4a81b 100644
--- a/README.md
+++ b/README.md
@@ -20,16 +20,16 @@ An example site is available [here](https://lab.bdro.fr/tinystatus/).
 To install tinystatus:
 
 * Clone the repository and go to the created directory
-* Edit the checks file `checks.list`
-* To add incidents or maintenance, edit `incidents.list`
+* Edit the checks file `checks.csv`
+* To add incidents or maintenance, edit `incidents.txt`
 * Generate status page `./tinystatus > index.html`
 * Serve the page with your favorite web server
 
 ## Configuration file
 
-The syntax of `checks.list` file is:
+The syntax of `checks.csv` file is:
 ```
-Command | Expected Code | Status Text | Host to check
+Command, Expected Code, Status Text, Host to check
 ```
 
 Command can be:
@@ -38,4 +38,4 @@ Command can be:
 * `port` - Check open port status
 
 There are also `http4`, `http6`, `ping4`, `ping6`, `port4`, `port6` for IPv4 or IPv6 only check.
-
+Note: `port4` and `port6` require OpenBSD `nc` binary.
diff --git a/checks.csv b/checks.csv
new file mode 100644
index 0000000..fe07509
--- /dev/null
+++ b/checks.csv
@@ -0,0 +1,6 @@
+http,   200,  Google Website,         https://google.com
+http4,  200,  Google Website (IPv4),  https://google.com
+http6,  200,  Google Website (IPv6),  https://google.com
+http,   404,  Google 404,             https://google.com/dummy
+ping,   0,    Google ping,            8.8.8.8
+port,   0,    Google DNS,             8.8.8.8 53
diff --git a/checks.list b/checks.list
deleted file mode 100644
index afa77ab..0000000
--- a/checks.list
+++ /dev/null
@@ -1,6 +0,0 @@
-http  | 200 | Google website        | https://google.com
-http4 | 200 | Google Website (IPv4) | https://google.com
-http6 | 200 | Google Website (IPv6) | https://google.com
-http  | 404 | Google 404            | https://google.com/dummy
-ping  | 0   | Google ping           | 8.8.8.8
-port  | 0   | Google dns            | 8.8.8.8 53
diff --git a/incidents.list b/incidents.txt
similarity index 100%
rename from incidents.list
rename to incidents.txt
diff --git a/tinystatus b/tinystatus
index 7f82c08..cb6f8d2 100755
--- a/tinystatus
+++ b/tinystatus
@@ -3,8 +3,9 @@
 title=tinystatus
 timeout=10
 tmp="$(mktemp -d)"
-checkfile="${1:-checks.list}"
-incidentsfile="${2:-incidents.list}"
+checkfile="${1:-checks.csv}"
+incidentsfile="${2:-incidents.txt}"
+failonoutage=false
 useragent="User-Agent: Mozilla/5.0 (X11; Linux x86_64; Debian) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36"
 
 command_exists(){
@@ -15,7 +16,7 @@ command_exists(){
 }
 
 get_element(){
-    echo "${2}" | awk -v col="${1}" -F'|' '{gsub(/^[ \t]+|[ \t]+$/, "", $col); print $col}'
+    echo "${2}" | awk -v col="${1}" -F',' '{gsub(/^[ \t]+|[ \t]+$/, "", $col); print $col}'
 }
 
 check(){
@@ -53,6 +54,7 @@ check(){
 
 command_exists 'curl'
 command_exists 'nc'
+command_exists 'ping'
 mkdir -p "${tmp}/ok" "${tmp}/ko" || exit 1
 
 while IFS="$(printf '\n')" read -r line; do
@@ -106,7 +108,7 @@ for file in "${tmp}/ok/"*.status; do
 done
 cat << EOF
 </ul>
-<p class=small> Last check: $(date +"%Y/%m/%d %H:%M:%S")</p>
+<p class=small> Last check: $(date -I'seconds')</p>
 EOF
 if [ -f "${incidentsfile}" ]; then
     echo '<h1>Incidents</h1>'
@@ -120,5 +122,9 @@ cat <<EOF
 </div>
 </body></html>
 EOF
-rm -r "${tmp}" 2>/dev/null
+
+rm -r "${tmp}" 2>/dev/null
+if [ "${failonoutage}" = true ]; then
+    exit "${outagenb}"
+fi