diff --git a/src/lib/plugins/effects.js b/src/lib/plugins/effects.js
index 93a5dd2..ad35f0a 100644
--- a/src/lib/plugins/effects.js
+++ b/src/lib/plugins/effects.js
@@ -7,6 +7,7 @@ module.exports.entity = function(entity, serv) {
 
   entity.sendEffect = (effectId, {amplifier=0,duration=30*20,particles=true,whitelist,blacklist=[]}={}) => {
     if (!whitelist) whitelist = serv.getNearby(entity);
+    if (entity.type == 'player' && [1].indexOf(effectId) != -1) entity.sendAbilities();
     var sendTo = whitelist.filter(p => blacklist.indexOf(p) == -1);
     var data = {
       entityId: entity.id,
diff --git a/src/lib/plugins/login.js b/src/lib/plugins/login.js
index 8b158eb..880b58c 100644
--- a/src/lib/plugins/login.js
+++ b/src/lib/plugins/login.js
@@ -173,5 +173,6 @@ module.exports.player=function(player,serv)
     await player.waitPlayerLogin();
     player.sendRestMap();
     sendChunkWhenMove();
+    player.sendAbilities();
   };
 };
\ No newline at end of file
diff --git a/src/lib/plugins/updatePositions.js b/src/lib/plugins/updatePositions.js
index 55fe0af..3a63266 100644
--- a/src/lib/plugins/updatePositions.js
+++ b/src/lib/plugins/updatePositions.js
@@ -67,6 +67,18 @@ module.exports.player=function(player)
     var notCancelled = await player.sendPosition(position.scaled(32).floored(), false, true);
     if (notCancelled) player.sendSelfPosition();
   }
+
+  player.sendAbilities = () => {
+    var f = (+(player.gameMode == 1)*1) + (+(player.gameMode == 1 || player.gameMode == 3)*2) + (+(player.gameMode == 1 || player.gamemode == 3)*4);
+    var walkingSpeed = 1.0 + ((player.effects[1] != null ? (player.effects[1].amplifier + 1) : 0) * 0.2)
+    var flyingSpeed = 0.2;
+    console.log(walkingSpeed, flyingSpeed);
+    player._client.write('abilities', {
+      flags: f,
+      walkingSpeed: walkingSpeed,
+      flyingSpeed: flyingSpeed
+    });
+  }
 };
 
 module.exports.entity=function(entity,serv){