diff --git a/src/CoroutineBase.cs b/src/CoroutineBase.cs
index 312adb3..f3b6142 100644
--- a/src/CoroutineBase.cs
+++ b/src/CoroutineBase.cs
@@ -63,7 +63,7 @@ public void Init()
     /// <summary>
     /// Called when the coroutine starts.
     /// </summary>
-    public virtual void OnEnter() { }
+    protected virtual void OnEnter() { }
 
     /// <summary>
     /// Called every frame if the coroutine is playing.
@@ -73,14 +73,14 @@ public virtual void Update() { }
     /// <summary>
     /// Called when the coroutine is killed.
     /// </summary>
-    public virtual void OnExit() { }
+    protected virtual void OnExit() { }
 
     /// <summary>
     /// Starts playing this coroutine, meaning that it will receive Update() calls
     /// each frame. This is independent of the child coroutines.
     /// This method only works if the coroutine is still alive.
     /// </summary>
-    public void ResumeUpdates()
+    protected void ResumeUpdates()
     {
         if (!IsAlive)
         {
@@ -95,7 +95,7 @@ public void ResumeUpdates()
     /// Stops giving the coroutine Update() calls each frame.
     /// This is independent of the child coroutines.
     /// </summary>
-    public void PauseUpdates()
+    protected void PauseUpdates()
     {
         IsPlaying = false;
         Manager.DeactivateCoroutine(this);
@@ -147,7 +147,7 @@ public void Kill()
     /// <summary>
     /// Adds a coroutine as a child.
     /// </summary>
-    protected void AddChild(CoroutineBase coroutine)
+    private void AddChild(CoroutineBase coroutine)
     {
         if (firstChild == null)
         {
@@ -165,7 +165,7 @@ protected void AddChild(CoroutineBase coroutine)
     /// <summary>
     /// Removes a child from the list of child coroutines.
     /// </summary>
-    protected void RemoveChild(CoroutineBase coroutine)
+    private void RemoveChild(CoroutineBase coroutine)
     {
         if (coroutine.previousSibling != null)
         {
diff --git a/src/Coroutines/AwaitCoroutine.cs b/src/Coroutines/AwaitCoroutine.cs
index 216c73e..f721c1a 100644
--- a/src/Coroutines/AwaitCoroutine.cs
+++ b/src/Coroutines/AwaitCoroutine.cs
@@ -16,7 +16,7 @@ public AwaitCoroutine(Task<T> task)
         this.Task = task;
     }
 
-    public override void OnEnter()
+    protected override void OnEnter()
     {
         // As the CoroutineManager class is not thread safe, ensure that Kill()
         // is executed on the main Godot thread.
@@ -39,7 +39,7 @@ public AwaitCoroutine(Task task)
         this.Task = task;
     }
 
-    public override void OnEnter()
+    protected override void OnEnter()
     {
         // As the CoroutineManager class is not thread safe, ensure that Kill()
         // is executed on the main Godot thread.
diff --git a/src/Coroutines/Coroutine.cs b/src/Coroutines/Coroutine.cs
index 58df6d4..6a9a155 100644
--- a/src/Coroutines/Coroutine.cs
+++ b/src/Coroutines/Coroutine.cs
@@ -25,7 +25,7 @@ public Coroutine(Func<Coroutine, IEnumerator> creator)
         this.routine = creator(this);
     }
 
-    public override void OnEnter()
+    protected override void OnEnter()
     {
         if (routine == null)
         {
diff --git a/src/Coroutines/ParallelCoroutine.cs b/src/Coroutines/ParallelCoroutine.cs
index 6969f4f..bf0fadf 100644
--- a/src/Coroutines/ParallelCoroutine.cs
+++ b/src/Coroutines/ParallelCoroutine.cs
@@ -12,7 +12,7 @@ public ParallelCoroutine(params CoroutineBase[] coroutines)
         this.coroutines = coroutines;
     }
 
-    public override void OnEnter()
+    protected override void OnEnter()
     {
         if (coroutines.Length == 0)
         {
diff --git a/src/Coroutines/RepeatCoroutine.cs b/src/Coroutines/RepeatCoroutine.cs
index c61c816..5a3576c 100644
--- a/src/Coroutines/RepeatCoroutine.cs
+++ b/src/Coroutines/RepeatCoroutine.cs
@@ -20,7 +20,7 @@ public RepeatCoroutine(int repeatTimes, Func<RepeatCoroutine, CoroutineBase> cor
         this.coroutineCreator = coroutineCreator;
     }
 
-    public override void OnEnter()
+    protected override void OnEnter()
     {
         if (repeatTimes == 0)
         {
diff --git a/src/Coroutines/SequentialCoroutine.cs b/src/Coroutines/SequentialCoroutine.cs
index 6f6d416..7d54115 100644
--- a/src/Coroutines/SequentialCoroutine.cs
+++ b/src/Coroutines/SequentialCoroutine.cs
@@ -14,7 +14,7 @@ public SequentialCoroutine(params CoroutineBase[] coroutines)
         this.coroutines = coroutines;
     }
 
-    public override void OnEnter()
+    protected override void OnEnter()
     {
         if (coroutines.Length == 0)
         {
diff --git a/src/Coroutines/TweenCoroutine.cs b/src/Coroutines/TweenCoroutine.cs
index d0c5ec2..d60d59d 100644
--- a/src/Coroutines/TweenCoroutine.cs
+++ b/src/Coroutines/TweenCoroutine.cs
@@ -18,7 +18,7 @@ public TweenCoroutine(Func<Tween> createTween)
         this.createTween = createTween;
     }
 
-    public override void OnEnter()
+    protected override void OnEnter()
     {
         tween = createTween();
         
@@ -30,7 +30,7 @@ public override void OnEnter()
         tween.Finished += Kill;
     }
 
-    public override void OnExit()
+    protected override void OnExit()
     {
         tween.Kill();
     }
diff --git a/src/Coroutines/WaitDelayCoroutine.cs b/src/Coroutines/WaitDelayCoroutine.cs
index e25a92e..2a239f2 100644
--- a/src/Coroutines/WaitDelayCoroutine.cs
+++ b/src/Coroutines/WaitDelayCoroutine.cs
@@ -12,7 +12,7 @@ public WaitDelayCoroutine(float delay)
         this.delay = delay;
     }
 
-    public override void OnEnter()
+    protected override void OnEnter()
     {
         Manager.GetTree().CreateTimer(delay).Timeout += Kill;
     }
diff --git a/src/Coroutines/WaitForSignalCoroutine.cs b/src/Coroutines/WaitForSignalCoroutine.cs
index ed7b936..a185c2a 100644
--- a/src/Coroutines/WaitForSignalCoroutine.cs
+++ b/src/Coroutines/WaitForSignalCoroutine.cs
@@ -16,7 +16,7 @@ public WaitForSignalCoroutine(GodotObject obj, string signal)
         this.targetSignal = signal;
     }
 
-    public override void OnEnter() {
+    protected override void OnEnter() {
         Manager.ToSignal(targetObject, targetSignal).OnCompleted(Kill);
     }
 }
\ No newline at end of file
diff --git a/src/Coroutines/WaitUntilCoroutine.cs b/src/Coroutines/WaitUntilCoroutine.cs
index 228e4ae..be15667 100644
--- a/src/Coroutines/WaitUntilCoroutine.cs
+++ b/src/Coroutines/WaitUntilCoroutine.cs
@@ -14,7 +14,7 @@ public WaitUntilCoroutine(Func<Boolean> condition)
         this.condition = condition;
     }
 
-    public override void OnEnter()
+    protected override void OnEnter()
     {
         CheckCondition();
         if (IsAlive) ResumeUpdates();
diff --git a/src/Coroutines/WaitWhileCoroutine.cs b/src/Coroutines/WaitWhileCoroutine.cs
index 1688925..d8ee07b 100644
--- a/src/Coroutines/WaitWhileCoroutine.cs
+++ b/src/Coroutines/WaitWhileCoroutine.cs
@@ -14,7 +14,7 @@ public WaitWhileCoroutine(Func<Boolean> condition)
         this.condition = condition;
     }
 
-    public override void OnEnter()
+    protected override void OnEnter()
     {
         CheckCondition();
         if (IsAlive) ResumeUpdates();