diff --git a/README.md b/README.md
index 2a9bdfb..59a613c 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ To compile for windows, MSYS2 is used. First verify that all required packages a
 ## License
 
 ```
-Copyright (c) 2022 Wojciech Graj
+Copyright (c) 2022-2023 Wojciech Graj
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
diff --git a/res/shader/earth.frag b/res/shader/earth.frag
index fedf645..cfeb26b 100644
--- a/res/shader/earth.frag
+++ b/res/shader/earth.frag
@@ -1,4 +1,5 @@
-#version 430 core
+#version 410 core
+#extension GL_ARB_explicit_uniform_location : enable
 
 out vec4 frag_color;
 
diff --git a/res/shader/earth.vert b/res/shader/earth.vert
index 591cf4f..770d927 100644
--- a/res/shader/earth.vert
+++ b/res/shader/earth.vert
@@ -1,4 +1,5 @@
-#version 430 core
+#version 410 core
+#extension GL_ARB_explicit_uniform_location : enable
 layout (location = 0) in vec3 in_pos;
 layout (location = 1) in vec2 in_uv;
 
diff --git a/res/shader/satellite.frag b/res/shader/satellite.frag
index 94a5754..ed8c374 100644
--- a/res/shader/satellite.frag
+++ b/res/shader/satellite.frag
@@ -1,4 +1,5 @@
-#version 430 core
+#version 410 core
+#extension GL_ARB_explicit_uniform_location : enable
 
 out vec4 frag_color;
 
diff --git a/res/shader/satellite.vert b/res/shader/satellite.vert
index 8b8943f..6efc7af 100644
--- a/res/shader/satellite.vert
+++ b/res/shader/satellite.vert
@@ -1,4 +1,5 @@
-#version 430 core
+#version 410 core
+#extension GL_ARB_explicit_uniform_location : enable
 
 layout (location = 0) in vec3 in_pos;
 layout (location = 1) in vec3 in_color;
diff --git a/res/shader/sky.frag b/res/shader/sky.frag
index b963cd3..5d3d65a 100644
--- a/res/shader/sky.frag
+++ b/res/shader/sky.frag
@@ -1,4 +1,5 @@
-#version 430 core
+#version 410 core
+#extension GL_ARB_explicit_uniform_location : enable
 
 out vec4 frag_color;
 
diff --git a/res/shader/sky.vert b/res/shader/sky.vert
index c4faae8..170143d 100644
--- a/res/shader/sky.vert
+++ b/res/shader/sky.vert
@@ -1,4 +1,6 @@
-#version 430 core
+#version 410 core
+#extension GL_ARB_explicit_uniform_location : enable
+
 layout (location = 0) in vec3 in_pos;
 layout (location = 1) in vec2 in_uv;
 
diff --git a/src/gfx/gfx.c b/src/gfx/gfx.c
index decc000..43c6376 100644
--- a/src/gfx/gfx.c
+++ b/src/gfx/gfx.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Wojciech Graj
+ * Copyright (c) 2022-2023 Wojciech Graj
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -88,5 +88,5 @@ void gfx_init(GtkBuilder *builder)
 		NULL);
 
 	glarea = GTK_GL_AREA(gtk_builder_get_object(builder, "glarea"));
-	gtk_gl_area_set_required_version(glarea, 4, 3);
+	gtk_gl_area_set_required_version(glarea, 4, 1);
 }