diff --git a/internal/radio/listener_counter.go b/internal/radio/listener_counter.go
index e3d3839..dbf51d2 100644
--- a/internal/radio/listener_counter.go
+++ b/internal/radio/listener_counter.go
@@ -11,7 +11,7 @@ import (
 // ListenerCounter stores the current and peak numbers of listeners.
 type ListenerCounter struct {
 	mutex         sync.RWMutex
-	current, peak int
+	current, peak int64
 }
 
 // NewListenerCounter returns a new ListenerCounter struct instance.
@@ -20,26 +20,26 @@ func NewListenerCounter() *ListenerCounter {
 }
 
 // Current returns a number of current listeners.
-func (l *ListenerCounter) Current() int {
+func (l *ListenerCounter) Current() int64 {
 	l.mutex.RLock()
 	defer l.mutex.RUnlock()
 	return l.current
 }
 
 // Current returns a number of peak listeners.
-func (l *ListenerCounter) Peak() int {
+func (l *ListenerCounter) Peak() int64 {
 	l.mutex.RLock()
 	defer l.mutex.RUnlock()
 	return l.peak
 }
 
 // Inc increments by 1 a current number of listeners and updates a peak number.
-func (l *ListenerCounter) Inc() int {
+func (l *ListenerCounter) Inc() int64 {
 	l.mutex.Lock()
 	defer l.mutex.Unlock()
-	if l.current == math.MaxInt {
+	if l.current == math.MaxInt64 {
 		// We panic here because if this will ever happen, then something's going certainly wrong.
-		panic(fmt.Sprint("a current number of listeners exceeded MaxInt which is", math.MaxInt))
+		panic(fmt.Sprint("a current number of listeners exceeded MaxInt64 which is", math.MaxInt))
 	}
 	l.current++
 	if l.current > l.peak {
@@ -50,7 +50,7 @@ func (l *ListenerCounter) Inc() int {
 
 // Dec decrements by 1 a current number of listeners. An error will occur if
 // a resulting number is less than 0.
-func (l *ListenerCounter) Dec() (int, error) {
+func (l *ListenerCounter) Dec() (int64, error) {
 	l.mutex.Lock()
 	defer l.mutex.Unlock()
 	if l.current == 0 {
@@ -64,8 +64,8 @@ func (l *ListenerCounter) MarshalJSON() ([]byte, error) {
 	l.mutex.RLock()
 	defer l.mutex.RUnlock()
 	return json.Marshal(&struct {
-		Current int `json:"current"`
-		Peak    int `json:"peak"`
+		Current int64 `json:"current"`
+		Peak    int64 `json:"peak"`
 	}{
 		Current: l.current,
 		Peak:    l.peak})