diff --git a/Cargo.toml b/Cargo.toml
index 776220d..780711c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,8 +32,7 @@ thiserror = "1"
 flatbuffers = "^23"
 image = { version = "^0", default-features = false, optional = true }
 imageproc = { version = "^0", default-features = false, optional = true }
-rusttype = { version = "^0", default-features = false, optional = true }
-conv = { version = "^0", default-features = false, optional = true }
+ab_glyph = { version = "^0", optional = true }
 regex = { version = "^1", optional = true }
 lazy_static = { version = "^1", optional = true }
 symphonia-core = { version = "^0", optional = true }
@@ -50,7 +49,7 @@ branch = "wasm32-wasi"
 default = ["audio", "vision", "text"]
 
 audio = ["symphonia-core"]
-vision = ["image", "imageproc", "rusttype", "lazy_static", "conv"]
+vision = ["image", "imageproc", "lazy_static", "ab_glyph"]
 text = ["regex", "lazy_static"]
 
 ffmpeg = ["ffmpeg-next"]
diff --git a/src/postprocess/containers/vision/detection_result.rs b/src/postprocess/containers/vision/detection_result.rs
index 2ed8dea..b07d8a0 100644
--- a/src/postprocess/containers/vision/detection_result.rs
+++ b/src/postprocess/containers/vision/detection_result.rs
@@ -31,8 +31,7 @@ impl DetectionResult {
     where
         I: image::GenericImage,
         I::Pixel: 'static + DefaultPixel,
-        <I::Pixel as image::Pixel>::Subpixel:
-            conv::ValueInto<f32> + imageproc::definitions::Clamp<f32>,
+        <I::Pixel as image::Pixel>::Subpixel: Into<f32> + imageproc::definitions::Clamp<f32>,
     {
         draw_detection_with_options(img, self, &Default::default());
     }
@@ -43,8 +42,7 @@ impl DetectionResult {
     where
         I: image::GenericImage,
         I::Pixel: 'static,
-        <I::Pixel as image::Pixel>::Subpixel:
-            conv::ValueInto<f32> + imageproc::definitions::Clamp<f32>,
+        <I::Pixel as image::Pixel>::Subpixel: Into<f32> + imageproc::definitions::Clamp<f32>,
     {
         draw_detection_with_options(img, self, options);
     }
diff --git a/src/postprocess/mod.rs b/src/postprocess/mod.rs
index 012dade..f5d7cfd 100644
--- a/src/postprocess/mod.rs
+++ b/src/postprocess/mod.rs
@@ -10,5 +10,5 @@ pub(crate) use ops::{Activation, QuantizationParameters};
 mod processing;
 pub(crate) use processing::*;
 
-/// Utils to to make use of task results, such as drawing utils.
+/// Utils to make use of task results, such as drawing utils.
 pub mod utils;
diff --git a/src/postprocess/utils/vision/default_font/mod.rs b/src/postprocess/utils/vision/default_font/mod.rs
index a1baabe..632631e 100644
--- a/src/postprocess/utils/vision/default_font/mod.rs
+++ b/src/postprocess/utils/vision/default_font/mod.rs
@@ -2,15 +2,15 @@
 // The file `Roboto-Regulat.ttf` is downloaded from https://fonts.google.com/specimen/Roboto.
 // This font file is under Apache 2.0: https://github.com/googlefonts/roboto/blob/main/LICENSE
 
-use rusttype::Font;
+use ab_glyph::FontArc;
 
 const DEFAULT_FONT_BYTES: &[u8] = include_bytes!("./Roboto-Regular.ttf");
 
 lazy_static::lazy_static! {
-    static ref DEFAULT_FONT: Font<'static> = Font::try_from_bytes(DEFAULT_FONT_BYTES).unwrap();
+    static ref DEFAULT_FONT: FontArc = FontArc::try_from_slice(DEFAULT_FONT_BYTES).unwrap();
 }
 
 /// Get default ascii font
-pub fn default_font() -> &'static Font<'static> {
+pub fn default_font() -> &'static FontArc {
     &DEFAULT_FONT
 }
diff --git a/src/postprocess/utils/vision/draw_detections.rs b/src/postprocess/utils/vision/draw_detections.rs
index 1717ec5..3e86cdf 100644
--- a/src/postprocess/utils/vision/draw_detections.rs
+++ b/src/postprocess/utils/vision/draw_detections.rs
@@ -1,8 +1,8 @@
 use super::DefaultPixel;
 use crate::postprocess::DetectionResult;
+use ab_glyph::{FontArc, PxScale};
 use image::{GenericImage, Pixel};
 use imageproc::{definitions::Clamp, drawing};
-use rusttype::{Font, Scale};
 
 /// draw detection results options
 #[derive(Debug)]
@@ -14,7 +14,7 @@ pub struct DrawDetectionsOptions<'font, P: Pixel> {
     pub keypoint_radius_percent: f32,
 
     pub draw_label: bool,
-    pub font: &'font Font<'font>,
+    pub font: &'font FontArc,
     pub font_color: P,
     pub font_scale: f32,
 }
@@ -43,7 +43,7 @@ pub fn draw_detection<I>(img: &mut I, detection_result: &DetectionResult)
 where
     I: GenericImage,
     I::Pixel: 'static + DefaultPixel,
-    <I::Pixel as Pixel>::Subpixel: conv::ValueInto<f32> + Clamp<f32>,
+    <I::Pixel as Pixel>::Subpixel: Into<f32> + Clamp<f32>,
 {
     draw_detection_with_options::<I>(img, detection_result, &Default::default())
 }
@@ -55,7 +55,7 @@ pub fn draw_detection_with_options<I>(
     options: &DrawDetectionsOptions<I::Pixel>,
 ) where
     I: GenericImage,
-    <I::Pixel as Pixel>::Subpixel: conv::ValueInto<f32> + Clamp<f32>,
+    <I::Pixel as Pixel>::Subpixel: Into<f32> + Clamp<f32>,
     I::Pixel: 'static,
 {
     let img_w = img.width() as f32;
@@ -67,7 +67,7 @@ pub fn draw_detection_with_options<I>(
     } else {
         options.keypoint_colors[0]
     };
-    let font_scale = Scale {
+    let font_scale = PxScale {
         x: img_min * options.font_scale,
         y: img_min * options.font_scale,
     };
diff --git a/src/tasks/vision/hand_landmark/result.rs b/src/tasks/vision/hand_landmark/result.rs
index ff449cb..54c637b 100644
--- a/src/tasks/vision/hand_landmark/result.rs
+++ b/src/tasks/vision/hand_landmark/result.rs
@@ -22,8 +22,7 @@ impl HandLandmarkResult {
     where
         I: image::GenericImage,
         I::Pixel: 'static + DefaultPixel,
-        <I::Pixel as image::Pixel>::Subpixel:
-            conv::ValueInto<f32> + imageproc::definitions::Clamp<f32>,
+        <I::Pixel as image::Pixel>::Subpixel: Into<f32> + imageproc::definitions::Clamp<f32>,
     {
         let mut options = DrawLandmarksOptions::default();
         options.connections = HandLandmark::CONNECTIONS;
@@ -36,8 +35,7 @@ impl HandLandmarkResult {
     where
         I: image::GenericImage,
         I::Pixel: 'static,
-        <I::Pixel as image::Pixel>::Subpixel:
-            conv::ValueInto<f32> + imageproc::definitions::Clamp<f32>,
+        <I::Pixel as image::Pixel>::Subpixel: Into<f32> + imageproc::definitions::Clamp<f32>,
     {
         draw_landmarks_with_options(img, &self.hand_landmarks, options);
     }