diff --git a/src/python/magnum/shaders.cpp b/src/python/magnum/shaders.cpp
index 2772fbd..17e6721 100644
--- a/src/python/magnum/shaders.cpp
+++ b/src/python/magnum/shaders.cpp
@@ -211,7 +211,7 @@ void shaders(py::module& m) {
                 &Shaders::Phong::setNormalMatrix, "Set normal matrix")
             .def_property("projection_matrix", nullptr,
                 &Shaders::Phong::setProjectionMatrix, "Set projection matrix")
-            .def_property("light_positions", nullptr, [](Shaders::Phong& self, const std::vector<Vector3>& positions) {
+            .def_property("light_positions", nullptr, [](Shaders::Phong& self, const std::vector<Vector4>& positions) {
                 if(positions.size() != self.lightCount()) {
                     PyErr_Format(PyExc_ValueError, "expected %u items but got %u", self.lightCount(), UnsignedInt(positions.size()));
                     throw py::error_already_set{};
@@ -219,7 +219,7 @@ void shaders(py::module& m) {
 
                 self.setLightPositions(positions);
             }, "Light positions")
-            .def_property("light_colors", nullptr, [](Shaders::Phong& self, const std::vector<Color4>& colors) {
+            .def_property("light_colors", nullptr, [](Shaders::Phong& self, const std::vector<Color3>& colors) {
                 if(colors.size() != self.lightCount()) {
                     PyErr_Format(PyExc_ValueError, "expected %u items but got %u", self.lightCount(), UnsignedInt(colors.size()));
                     throw py::error_already_set{};
diff --git a/src/python/magnum/test/test_shaders_gl.py b/src/python/magnum/test/test_shaders_gl.py
index 84d9a23..09bcf9f 100644
--- a/src/python/magnum/test/test_shaders_gl.py
+++ b/src/python/magnum/test/test_shaders_gl.py
@@ -89,8 +89,8 @@ class Phong(GLTestCase):
         a.diffuse_color = (0.5, 1.0, 0.9)
         a.transformation_matrix = Matrix4.translation(Vector3.x_axis())
         a.projection_matrix = Matrix4.zero_init()
-        a.light_positions = [(0.5, 1.0, 0.3), Vector3()]
-        a.light_colors = [Color4(), Color4()]
+        a.light_positions = [(0.5, 1.0, 0.3, 1.0), Vector4()]
+        a.light_colors = [Color3(), Color3()]
         a.alpha_mask = 0.3
 
         texture = gl.Texture2D()