diff --git a/.env.example b/.env.example
index 0f1e566..43676ef 100644
--- a/.env.example
+++ b/.env.example
@@ -1,8 +1,10 @@
-GIN_MODE=release
-
 # interval in seconds
 INTERVAL=60
 
 # ping check destinations separated by comma
 PING_HOSTS=1.1.1.1,google.com
+PING_TIMEOUT=5
 PING_PRIVILEGED=false
+
+# webserver mode
+GIN_MODE=release
diff --git a/README.md b/README.md
index 7cb47ad..42ca3bb 100644
--- a/README.md
+++ b/README.md
@@ -4,12 +4,29 @@
 
 ## Features
 
-- Monitor network uptime
-- Pings & Speed test
+- Continuously monitors network availability with Pings to configurated servers
+- Web UI with interactive charts
 
 Built with [Go](https://go.dev/) and [SQLite](https://sqlite.org/).
 
-## Docker
+## Usage (Docker)
+
+```
+docker pull ghcr.io/romanzipp/sprinter:latest
+```
+
+See [repository](https://github.com/romanzipp/Sprinter/pkgs/container/sprinter) for more information.
+
+### Environment variables
+
+- `INTERVAL` Ping interval in seconds (default: `60`)
+- `PING_HOSTS` Destination servers, separated by comma (default: `1.1.1.1,google.com`)
+- `PING_TIMEOUT` Ping timeout in seconds (default: `5`)
+- `PING_PRIVILEGED` Privileged UDP ping mode (see [Troubleshooting](#troubleshooting))
+
+---
+
+### Local
 
 #### Build
 
@@ -62,6 +79,9 @@ yarn install
 ```shell
 yarn watch
 ```
+## Roadmap
+
+- [ ] Make ping timeout configurable
 
 ## Troubleshooting
 
diff --git a/config/config.go b/config/config.go
index 8160377..2dc4f9a 100644
--- a/config/config.go
+++ b/config/config.go
@@ -3,5 +3,6 @@ package config
 type Config struct {
 	Interval       int64
 	PingHosts      []string
+	PingTimeout    int64
 	PingPrivileged bool
 }
diff --git a/main.go b/main.go
index a94da3b..4ec455e 100644
--- a/main.go
+++ b/main.go
@@ -40,6 +40,10 @@ func main() {
 	)
 
 	conf := makeConfig()
+	if len(conf.PingHosts) == 0 {
+		panic("no ping hosts configured")
+	}
+
 	db := makeDb()
 	router := makeRouter(db)
 
@@ -50,11 +54,21 @@ func main() {
 
 func makeConfig() config.Config {
 	interval, _ := strconv.ParseInt(os.Getenv("INTERVAL"), 10, 64)
+	if interval == 0 {
+		interval = 60
+	}
+
+	timeout, _ := strconv.ParseInt(os.Getenv("PING_TIMEOUT"), 10, 64)
+	if timeout == 0 {
+		timeout = 5
+	}
+
 	pingHosts := strings.Split(os.Getenv("PING_HOSTS"), ",")
 
 	return config.Config{
 		Interval:       interval,
 		PingHosts:      pingHosts,
+		PingTimeout:    timeout,
 		PingPrivileged: os.Getenv("PING_PRIVILEGED") == "true",
 	}
 }
diff --git a/models/check.go b/models/check.go
index b340ddc..7f1e3c4 100644
--- a/models/check.go
+++ b/models/check.go
@@ -30,7 +30,7 @@ func ExecPingCheck(host string, id string, conf config.Config, db *gorm.DB) {
 	}
 
 	pinger.Count = 1
-	pinger.Timeout = 5 * time.Second
+	pinger.Timeout = time.Duration(conf.PingTimeout) * time.Second
 	pinger.Debug = true
 	err = pinger.Run()
 	if err != nil {