diff --git a/osu.Framework.Font/Graphics/Shaders/DefaultKaraokeLyricShader.cs b/osu.Framework.Font/Graphics/Shaders/DefaultKaraokeLyricShader.cs
index d1f0922..cb737d9 100644
--- a/osu.Framework.Font/Graphics/Shaders/DefaultKaraokeLyricShader.cs
+++ b/osu.Framework.Font/Graphics/Shaders/DefaultKaraokeLyricShader.cs
@@ -21,7 +21,7 @@ public class DefaultKaraokeLyricShader : InternalShader
 
         public int ShadowSize { get; set; }
 
-        public int ShadowSigma { get; set; }
+        public float ShadowSigma { get; set; }
 
         public Vector2 ShadowColour { get; set; }
 
@@ -38,6 +38,11 @@ public override void ApplyValue(FrameBuffer current)
             GetUniform<Vector4>(@"g_OutlineColour").UpdateValue(ref outlineColourMatrix);
 
             // shadow effect
+            var shadowOffset = ShadowOffset;
+            GetUniform<Vector2>(@"g_BlurDirection").UpdateValue(ref shadowOffset);
+
+            var shadowSigma = ShadowSigma;
+            GetUniform<float>(@"g_Sigma").UpdateValue(ref shadowSigma);
 
             // common property.
             var size = current.Size;
diff --git a/osu.Framework.Font/Resources/Shaders/sh_DefaultKaraokeLyric.fs b/osu.Framework.Font/Resources/Shaders/sh_DefaultKaraokeLyric.fs
index d3ec773..de6652d 100644
--- a/osu.Framework.Font/Resources/Shaders/sh_DefaultKaraokeLyric.fs
+++ b/osu.Framework.Font/Resources/Shaders/sh_DefaultKaraokeLyric.fs
@@ -45,5 +45,8 @@ lowp vec4 blur(sampler2D tex, int radius, highp vec2 direction, mediump vec2 tex
 
 void main(void)
 {
-	gl_FragColor = blur(m_Sampler, g_Radius, g_BlurDirection, v_TexCoord, g_TexSize, g_Sigma);
+	mediump vec4 originTexture = texture2D(m_Sampler, v_TexCoord) * g_Colour;
+	lowp vec4 outline = blur(m_Sampler, g_Radius, g_BlurDirection, v_TexCoord, g_TexSize, g_Sigma) * g_OutlineColour;
+	lowp vec4 shadow = blur(m_Sampler, g_Radius, g_BlurDirection, v_TexCoord, g_TexSize, g_Sigma);
+	gl_FragColor = originTexture;
 }
\ No newline at end of file