diff --git a/src/client/main.ts b/src/client/main.ts
index 5d4134b..54fcd10 100644
--- a/src/client/main.ts
+++ b/src/client/main.ts
@@ -32,9 +32,9 @@ function main() {
 		uniform mat4 uviewMatrix;
 		uniform mat4 umodelMatrix;
 
-		varying lowp vec4 vColor;
-		varying lowp vec4 vNormal;
-		varying lowp vec3 vPosition;
+		varying highp vec4 vColor;
+		varying highp vec4 vNormal;
+		varying highp vec3 vPosition;
 		void main()
 		{
 			gl_Position = uProjectionMatrix *
@@ -48,11 +48,11 @@ function main() {
 	`;
 
 	const fsSource = `
-	precision mediump float;
+	precision highp float;
 
-	varying lowp vec4 vColor;
-	varying lowp vec4 vNormal;
-	varying lowp vec3 vPosition;
+	varying highp vec4 vColor;
+	varying highp vec4 vNormal;
+	varying highp vec3 vPosition;
 
 	vec3 extremize(vec3 v, float n) {
 		if (v.x > n / 2.)