diff --git a/runtime/shaders/basic.f.glsl b/runtime/shaders/basic.f.glsl
index b51cfff..a3339ee 100644
--- a/runtime/shaders/basic.f.glsl
+++ b/runtime/shaders/basic.f.glsl
@@ -1,3 +1,5 @@
+#version 410
+
 uniform vec4 color;
 
 void main(void)
diff --git a/runtime/shaders/basic.v.glsl b/runtime/shaders/basic.v.glsl
index a281dd3..0cb046b 100644
--- a/runtime/shaders/basic.v.glsl
+++ b/runtime/shaders/basic.v.glsl
@@ -1,10 +1,12 @@
+#version 410
+
 /* Viewport width and height */
 uniform ivec2 viewport_size;
 /* Position of lower left corner of glyph */
 uniform ivec2 position;
 
 /* Vertex coordinates: x, y */
-attribute vec2 coords;
+layout(location = 0) in vec2 coords;
 
 /**
  * Map coordinates such that:
@@ -17,5 +19,5 @@ vec2 map_to_screen(vec2 position)
 
 void main(void)
 {
-    gl_Position = vec4(map_to_screen((vec2)position + coords), 0, 1);
+    gl_Position = vec4(map_to_screen(vec2(position) + coords), 0, 1);
 }
diff --git a/runtime/shaders/rect.v.glsl b/runtime/shaders/rect.v.glsl
index 2c551b1..83cf721 100644
--- a/runtime/shaders/rect.v.glsl
+++ b/runtime/shaders/rect.v.glsl
@@ -1,3 +1,5 @@
+#version 410
+
 /* Viewport width and height */
 uniform ivec2 viewport_size;
 /* Position of lower left corner of rectangle */
@@ -6,7 +8,7 @@ uniform ivec2 position;
 uniform ivec2 size;
 
 /* Vertex coordinates: x, y (0 or 1) */
-attribute ivec2 coords;
+layout(location = 0) in ivec2 coords;
 
 /**
  * Map coordinates such that:
@@ -19,5 +21,5 @@ vec2 map_to_screen(vec2 position)
 
 void main(void)
 {
-    gl_Position = vec4(map_to_screen((vec2)(position + coords * size)), 0, 1);
+    gl_Position = vec4(map_to_screen(vec2(position + coords * size)), 0, 1);
 }
diff --git a/runtime/shaders/text.f.glsl b/runtime/shaders/text.f.glsl
index 0494621..4f7b074 100644
--- a/runtime/shaders/text.f.glsl
+++ b/runtime/shaders/text.f.glsl
@@ -1,5 +1,7 @@
+#version 410
+
 /* Texture coordinate: s, t */
-varying vec2 texture_coord_v;
+in vec2 texture_coord_v;
 
 /* Texture unit */
 uniform sampler2D texture;
diff --git a/runtime/shaders/text.v.glsl b/runtime/shaders/text.v.glsl
index 5851094..1901809 100644
--- a/runtime/shaders/text.v.glsl
+++ b/runtime/shaders/text.v.glsl
@@ -1,13 +1,15 @@
+#version 410
+
 /* Viewport width and height */
 uniform ivec2 viewport_size;
 /* Position of lower left corner of glyph */
 uniform ivec2 position;
 
 /* Vertex coordinates: x, y, s, t */
-attribute vec4 coords;
+layout(location = 0) in vec4 coords;
 
 /* Output texture coordinate: s, t */
-varying vec2 texture_coord_v;
+out vec2 texture_coord_v;
 
 /**
  * Map coordinates such that:
@@ -20,6 +22,6 @@ vec2 map_to_screen(vec2 position)
 
 void main(void)
 {
-    gl_Position = vec4(map_to_screen((vec2)position + coords.xy), 0, 1);
+    gl_Position = vec4(map_to_screen(vec2(position) + coords.xy), 0, 1);
     texture_coord_v = coords.zw;
 }