diff --git a/README.md b/README.md
index 9509538..86f1826 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ these functions are dependent by [glslify](https://github.com/glslify/glslify).
 ## install
 
 ```
-npm i git://github.com/ykob/glsl-util.git
+yarn add @ykob/glsl-util
 ```
 
 ## usage
@@ -17,7 +17,7 @@ convert HSV to RGB.
 http://lolengine.net/blog/2013/07/27/rgb-to-hsv-in-glsl
 
 ```
-#pragma glslify: convertHsvToRgb = require(glsl-util/convertHsvToRgb);
+#pragma glslify: convertHsvToRgb = require(glsl-util/src/convertHsvToRgb);
 ```
 
 ### `convertRgbToHsv(vec3 rgb)`
@@ -26,7 +26,7 @@ convert RGB to HSV.
 http://lolengine.net/blog/2013/07/27/rgb-to-hsv-in-glsl
 
 ```
-#pragma glslify: convertRgbToHsv = require(glsl-util/convertRgbToHsv);
+#pragma glslify: convertRgbToHsv = require(glsl-util/src/convertRgbToHsv);
 ```
 
 ### `random(vec2 p)`
@@ -34,7 +34,7 @@ http://lolengine.net/blog/2013/07/27/rgb-to-hsv-in-glsl
 calculate white noise.
 
 ```
-#pragma glslify: random = require(glsl-util/random);
+#pragma glslify: random = require(glsl-util/src/random);
 ```
 
 ### `polar(float radian1, float radian2, float radius)`
@@ -42,7 +42,7 @@ calculate white noise.
 calculate polar coordinates.
 
 ```
-#pragma glslify: polar = require(glsl-util/polar);
+#pragma glslify: polar = require(glsl-util/src/polar);
 ```
 
 ### `gaussianBlur(sampler2D texture, vec2 uv, float radius, vec2 resolution, vec2 direction)`
@@ -50,7 +50,7 @@ calculate polar coordinates.
 calculate the Gaussian blur.
 
 ```
-#pragma glslify: gaussianBlur = require(glsl-util/gaussianBlur);
+#pragma glslify: gaussianBlur = require(glsl-util/src/gaussianBlur);
 ```
 
 ### `lookAt(vec3 base, vec3 p1, vec3 p2, vec3 up)`
@@ -58,7 +58,7 @@ calculate the Gaussian blur.
 rotate a vector in any direction.
 
 ```
-#pragma glslify: lookAt = require(glsl-util/lookAt);
+#pragma glslify: lookAt = require(glsl-util/src/lookAt);
 ```
 
 ### `rotateAxisAngle(vec3 p, vec3 axis, float angle)`
@@ -66,5 +66,5 @@ rotate a vector in any direction.
 rotate a vector by any axis and angle.
 
 ```
-#pragma glslify: rotateAxisAngle = require(glsl-util/rotateAxisAngle);
+#pragma glslify: rotateAxisAngle = require(glsl-util/src/rotateAxisAngle);
 ```