diff --git a/src/scenes/ScreenScene.ts b/src/scenes/ScreenScene.ts
index 74e7a8f..4566b67 100644
--- a/src/scenes/ScreenScene.ts
+++ b/src/scenes/ScreenScene.ts
@@ -99,6 +99,7 @@ export default class ScreenScene extends AbstractScene {
             vertexShader: vertexShaderAnts,
             fragmentShader: fragmentShaderAnts,
             transparent: true,
+            glslVersion: THREE.GLSL3,
         });
 
         this.createInstancedAntsMesh();
diff --git a/src/shaders/ants.vert b/src/shaders/ants.vert
index 12221a8..51b3bc5 100644
--- a/src/shaders/ants.vert
+++ b/src/shaders/ants.vert
@@ -3,8 +3,8 @@ precision highp int;
 
 #define PI 3.1415926535897932384626433832795
 
-varying vec2 vUv;
-varying float vIsCarryingFood;
+out vec2 vUv;
+out float vIsCarryingFood;
 
 uniform sampler2D tData;