diff --git a/utils.go b/utils.go
index e41f1405..c07581c9 100644
--- a/utils.go
+++ b/utils.go
@@ -8,8 +8,8 @@ import (
 )
 
 // Every triggers f every `t` time until the end of days.
-func Every(t string, f func()) {
-	c := time.Tick(parseDuration(t))
+func Every(t time.Duration, f func()) {
+	c := time.Tick(t)
 	// start a go routine to not bloc the function
 	go func() {
 		for {
@@ -23,8 +23,8 @@ func Every(t string, f func()) {
 }
 
 // After triggers the passed function after `t` duration.
-func After(t string, f func()) {
-	time.AfterFunc(parseDuration(t), f)
+func After(t time.Duration, f func()) {
+	time.AfterFunc(t, f)
 }
 
 func Publish(c chan interface{}, val interface{}) {
@@ -76,11 +76,3 @@ func ToScale(input, min, max float64) float64 {
 		return i
 	}
 }
-
-func parseDuration(t string) time.Duration {
-	dur, err := time.ParseDuration(t)
-	if err != nil {
-		panic(err)
-	}
-	return dur
-}
diff --git a/utils_test.go b/utils_test.go
index 743dde4c..95d9b5fb 100644
--- a/utils_test.go
+++ b/utils_test.go
@@ -15,7 +15,7 @@ var _ = Describe("Utils", func() {
 	Context("when valid", func() {
 		It("should execute function at every interval", func() {
 			var i = 0
-			Every("2ms", func() {
+			Every(2*time.Millisecond, func() {
 				i++
 			})
 			time.Sleep(5 * time.Millisecond)
@@ -23,7 +23,7 @@ var _ = Describe("Utils", func() {
 		})
 		It("should execute function after specific interval", func() {
 			var i = 0
-			After("1ms", func() {
+			After(1*time.Millisecond, func() {
 				i = i + 1
 			})
 			time.Sleep(2 * time.Millisecond)