diff --git a/shader.mjs b/shader.mjs
index be42fe4..919e5f2 100644
--- a/shader.mjs
+++ b/shader.mjs
@@ -125,8 +125,8 @@ function updateCamera(gl, program) {
   // Rotation
   const rot = gl.getUniformLocation(program, "camera_rot");
 
-  let M1 = calcRotationMatrix([0, 1, 0], mouse_pos[0]);
-  let M2 = calcRotationMatrix([1, 0, 0], mouse_pos[1]);
+  let M1 = calcRotationMatrix([0, -1, 0], mouse_pos[0]);
+  let M2 = calcRotationMatrix([-1, 0, 0], mouse_pos[1]);
   let rot_mat = glMatrix.mat3.create();
 
   glMatrix.mat3.mul(rot_mat, M1, M2);