diff --git a/README.md b/README.md
index 530cf9a..69ceda9 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ Variable|Description|Default
 `INTERFACE`*        | Wireguard-Interface Name                  |
 `IPV6_FORMAT`       | Format to use for converting v4 to v6 <br> The CIDR-Mask gets translated using 128 - 24 - Mask <br> e.g. `10.0.100.5/16` -> `fc12::0a00:6405/96`   | `fc12::%02x%02x:%02x%02x/%d`
 `FILTER_PREFIX`     | Prefix to filter for IP-Networks          | `100.100`
-`RECHECK_INTERVAL`  | Interval in seconds to recheck AllowedIPs entries in case something changed  | 300
+`RECHECK_INTERVAL`  | Interval in go-time-format to recheck AllowedIPs entries in case something changed  | 5m
 
 *\* Required*
 
diff --git a/cmd/app/main.go b/cmd/app/main.go
index 0e94083..1482fdd 100644
--- a/cmd/app/main.go
+++ b/cmd/app/main.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"net"
 	"os"
-	"strconv"
 	"time"
 
 	envChecks "git.ruekov.eu/ruakij/routingtabletowg/lib/environmentchecks"
@@ -21,7 +20,7 @@ var envRequired = []string{
 var envDefaults = map[string]string{
     "IPV6_FORMAT": "fc12::%02x%02x:%02x%02x/%d",
     "FILTER_PREFIX": "100.100",
-    "RECHECK_INTERVAL": "300",
+    "RECHECK_INTERVAL": "5m",
 }
 
 func main() {
@@ -49,11 +48,10 @@ func main() {
     filterPrefix := os.Getenv("FILTER_PREFIX")
 
     checkIntervalStr := os.Getenv("RECHECK_INTERVAL")
-    checkIntervalSec, err := strconv.Atoi(checkIntervalStr)
+    checkInterval, err := time.ParseDuration(checkIntervalStr)
 	if err != nil {
-		logger.Error.Fatalf("Couldn't read RECHECK_INTERVAL '%s': %s", checkIntervalStr, err)
+		logger.Error.Fatalf("Couldn't parse RECHECK_INTERVAL '%s': %s", checkIntervalStr, err)
 	}
-    checkInterval := time.Second * time.Duration(checkIntervalSec)
 
     // Get the IPv4 address of the interface
     addrs, err := netlink.AddrList(netInterface, netlink.FAMILY_V4)