diff --git a/Assets/Scenes/Main.unity b/Assets/Scenes/Main.unity
index c2a2185..6b57d65 100644
--- a/Assets/Scenes/Main.unity
+++ b/Assets/Scenes/Main.unity
@@ -1987,6 +1987,9 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   inputField: {fileID: 23275626}
+  unlockedSprite: {fileID: 6091405373536128358, guid: e70f17ed9e81410418db04270295ae3c, type: 3}
+  lockedSprite: {fileID: 21300000, guid: d8f3c281772d8ce428ce642723fa4ef9, type: 3}
+  button: {fileID: 1152326135}
 --- !u!114 &1152326134
 MonoBehaviour:
   m_ObjectHideFlags: 0
@@ -2063,7 +2066,7 @@ MonoBehaviour:
   m_OnCullStateChanged:
     m_PersistentCalls:
       m_Calls: []
-  m_Sprite: {fileID: 6091405373536128358, guid: e70f17ed9e81410418db04270295ae3c, type: 3}
+  m_Sprite: {fileID: 21300000, guid: d8f3c281772d8ce428ce642723fa4ef9, type: 3}
   m_Type: 0
   m_PreserveAspect: 0
   m_FillCenter: 1
diff --git a/Assets/Scripts/Messaging/Composer/SendButton.cs b/Assets/Scripts/Messaging/Composer/SendButton.cs
index 59993bc..ed6e34f 100644
--- a/Assets/Scripts/Messaging/Composer/SendButton.cs
+++ b/Assets/Scripts/Messaging/Composer/SendButton.cs
@@ -1,17 +1,33 @@
 using System;
 using UnityEngine;
 using UnityEngine.Serialization;
+using UnityEngine.UI;
 
 namespace Messaging.Composer {
 	public class SendButton : MonoBehaviour { 
 		[SerializeField] private InputField inputField;
 
+		[SerializeField] private Sprite unlockedSprite;
+		[SerializeField] private Sprite lockedSprite;
+		private bool _locked;
+		
+		[SerializeField] private Image button;
+
 		private MessageManager _messageManager;
 		
 		private void Awake() {
 			_messageManager = FindObjectOfType<MessageManager>();
 		}
 
+		public void Lock() {
+			_locked = true;
+			button.sprite = lockedSprite;
+		}
+		public void Unlock() {
+			_locked = false;
+			button.sprite = unlockedSprite;
+		}
+
 		public void SendEmojis() {
 			if (CanSendText()) {
 				_messageManager.CreateMessage(inputField.Text, true);
@@ -20,7 +36,8 @@ namespace Messaging.Composer {
 		}
 
 		private bool CanSendText() {
-			return !string.IsNullOrEmpty(inputField.Text) && !string.IsNullOrWhiteSpace(inputField.Text);
+			bool isInputEmpty = string.IsNullOrEmpty(inputField.Text) || string.IsNullOrWhiteSpace(inputField.Text);
+			return !isInputEmpty && !_locked;
 		}
 	}
 }
\ No newline at end of file
diff --git a/Assets/Scripts/Messaging/Typer/MessageManager.cs b/Assets/Scripts/Messaging/Typer/MessageManager.cs
index 8dae60e..a1cf144 100644
--- a/Assets/Scripts/Messaging/Typer/MessageManager.cs
+++ b/Assets/Scripts/Messaging/Typer/MessageManager.cs
@@ -31,12 +31,14 @@ namespace Messaging {
 		private readonly Regex _emojiGetter = new("<([a-z]+)(?![^>]*\\/>)[^>]*>");
 		private const int NumEmojis = 35;
 		private EmojiButtonManager _emojiButtonManager;
+		private SendButton _sendButton;
 
 		private void Awake() {
 			_messages = messageStructureGenerator.GenerateMessages();
 			_jokesBag = new List<TextAsset>(jokes);
 			_lives = FindObjectOfType<Lives>();
 			_emojiButtonManager = FindObjectOfType<EmojiButtonManager>();
+			_sendButton = FindObjectOfType<SendButton>();
 		}
 
 		private void Start() {
@@ -44,8 +46,10 @@ namespace Messaging {
 		}
 
 		private async void SendRandomJoke(float delay) {
-			//TODO: Lock send button here
+			_sendButton.Lock();
 			await Task.Delay((int)(delay * 1000));
+			_sendButton.Unlock();
+			
 			_currentJoke = GetRandomJoke();
 			CreateMessage(_currentJoke.QuestionMessage.Key, false);
 			_emojiButtonManager.SetButtonImages(GenerateButtonOptions());
diff --git a/Assets/Sprites/enviarapagado.png.meta b/Assets/Sprites/enviarapagado.png.meta
index ebe4770..5e3b44c 100644
--- a/Assets/Sprites/enviarapagado.png.meta
+++ b/Assets/Sprites/enviarapagado.png.meta
@@ -34,7 +34,7 @@ TextureImporter:
   maxTextureSize: 2048
   textureSettings:
     serializedVersion: 2
-    filterMode: 1
+    filterMode: 0
     aniso: 1
     mipBias: 0
     wrapU: 1
@@ -48,7 +48,7 @@ TextureImporter:
   spriteMeshType: 1
   alignment: 0
   spritePivot: {x: 0.5, y: 0.5}
-  spritePixelsToUnits: 100
+  spritePixelsToUnits: 16
   spriteBorder: {x: 0, y: 0, z: 0, w: 0}
   spriteGenerateFallbackPhysicsShape: 1
   alphaUsage: 1
@@ -72,7 +72,7 @@ TextureImporter:
     maxTextureSize: 2048
     resizeAlgorithm: 0
     textureFormat: -1
-    textureCompression: 1
+    textureCompression: 0
     compressionQuality: 50
     crunchedCompression: 0
     allowsAlphaSplitting: 0