diff --git a/src/8.guest/2020/skeletal_animation/anim_model.vs b/src/8.guest/2020/skeletal_animation/anim_model.vs
index 552adb2..6caec57 100644
--- a/src/8.guest/2020/skeletal_animation/anim_model.vs
+++ b/src/8.guest/2020/skeletal_animation/anim_model.vs
@@ -3,8 +3,10 @@
 layout(location = 0) in vec3 pos;
 layout(location = 1) in vec3 norm;
 layout(location = 2) in vec2 tex;
-layout(location = 3) in ivec4 boneIds; 
-layout(location = 4) in vec4 weights;
+layout(location = 3) in vec3 tangent;
+layout(location = 4) in vec3 bitangent;
+layout(location = 5) in ivec4 boneIds; 
+layout(location = 6) in vec4 weights;
 
 uniform mat4 projection;
 uniform mat4 view;