diff --git a/Cargo.toml b/Cargo.toml
index f706263..8b47468 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,8 +19,8 @@ edition = "2021"
 
 [workspace.dependencies]
 clap = { version = "4.5.1", features = ["derive"] }
-gltf = { version = "=1.3.0", default-features = false, features = [ "import", "names", "utils" ] }
-gltf-json = { version = "=1.3.0", features = [ "names" ] }
+gltf = { version = "=1.4.0", default-features = false, features = [ "import", "names", "utils" ] }
+gltf-json = { version = "=1.4.0", features = [ "names" ] }
 grim = { path = "core/grim" }
 itertools = "0.12.1"
 lazy_static = "1.4.0"
diff --git a/core/grim/src/model/export.rs b/core/grim/src/model/export.rs
index 30167bc..8593df5 100644
--- a/core/grim/src/model/export.rs
+++ b/core/grim/src/model/export.rs
@@ -1065,7 +1065,7 @@ impl GltfExporter {
             
             json::Buffer {
                 name: None,
-                byte_length: total_size as u32,
+                byte_length: total_size.into(),
                 uri: Some(str_data),
                 extensions: None,
                 extras: Default::default()
@@ -1075,9 +1075,9 @@ impl GltfExporter {
         gltf.buffer_views = vec![
             json::buffer::View {
                 name:  Some(String::from("verts_norms")),
-                byte_length: bv_verts_norms as u32,
-                byte_offset: Some(0),
-                byte_stride: Some(12),
+                byte_length: bv_verts_norms.into(),
+                byte_offset: Some(0u64.into()),
+                byte_stride: Some(json::buffer::Stride(12)),
                 buffer: json::Index::new(0),
                 target: None,
                 extensions: None,
@@ -1085,9 +1085,9 @@ impl GltfExporter {
             },
             json::buffer::View {
                 name:  Some(String::from("uvs")),
-                byte_length: bv_uvs as u32,
-                byte_offset: Some(bv_verts_norms as u32),
-                byte_stride: Some(8),
+                byte_length: bv_uvs.into(),
+                byte_offset: Some(bv_verts_norms.into()),
+                byte_stride: Some(json::buffer::Stride(8)),
                 buffer: json::Index::new(0),
                 target: None,
                 extensions: None,
@@ -1095,9 +1095,9 @@ impl GltfExporter {
             },
             json::buffer::View {
                 name:  Some(String::from("weights_tans")),
-                byte_length: bv_weights_tans as u32,
-                byte_offset: Some((bv_verts_norms + bv_uvs) as u32),
-                byte_stride: Some(16),
+                byte_length: bv_weights_tans.into(),
+                byte_offset: Some((bv_verts_norms + bv_uvs).into()),
+                byte_stride: Some(json::buffer::Stride(16)),
                 buffer: json::Index::new(0),
                 target: None,
                 extensions: None,
@@ -1105,8 +1105,8 @@ impl GltfExporter {
             },
             json::buffer::View {
                 name:  Some(String::from("faces")),
-                byte_length: bv_faces as u32,
-                byte_offset: Some((bv_verts_norms + bv_uvs + bv_weights_tans) as u32),
+                byte_length: bv_faces.into(),
+                byte_offset: Some((bv_verts_norms + bv_uvs + bv_weights_tans).into()),
                 byte_stride: None,
                 buffer: json::Index::new(0),
                 target: None,
diff --git a/core/grim_gltf/src/lib.rs b/core/grim_gltf/src/lib.rs
index 6fc3b42..2ba4971 100644
--- a/core/grim_gltf/src/lib.rs
+++ b/core/grim_gltf/src/lib.rs
@@ -1,7 +1,7 @@
 use gltf_json as json;
 use itertools::*;
 use serde::ser::Serialize;
-use std::collections::{HashMap};
+use std::collections::HashMap;
 
 pub struct AccessorBuilder {
     // Key = stride, Value = (idx, data)
@@ -93,8 +93,8 @@ impl AccessorBuilder {
         // Create accessor
         let accessor = json::Accessor {
             buffer_view: Some(json::Index::new(buff_idx as u32)),
-            byte_offset: Some(buff_off as u32),
-            count: count as u32,
+            byte_offset: Some(buff_off.into()),
+            count: count.into(),
             component_type: json::validation::Checked::Valid(json::accessor::GenericComponentType(comp_type)),
             extensions: None,
             extras: Default::default(),
@@ -139,11 +139,11 @@ impl AccessorBuilder {
 
             views.push(json::buffer::View {
                 name: None,
-                byte_length: data_size as u32,
-                byte_offset: Some(data_offset as u32),
+                byte_length: data_size.into(),
+                byte_offset: Some(data_offset.into()),
                 byte_stride: match stride {
                     64 => None, // Hacky way to disable writing stride for inverse bind transforms
-                    s if s % 4 == 0 => Some(stride as u32),
+                    s if s % 4 == 0 => Some(json::buffer::Stride(stride)),
                     _ => None // Don't encode if not multiple
                 },
                 buffer: json::Index::new(0),
@@ -163,7 +163,7 @@ impl AccessorBuilder {
         // Create buffer json
         let buffer = json::Buffer {
             name: None,
-            byte_length: buffer_data.len() as u32,
+            byte_length: buffer_data.len().into(),
             uri: match name.into() {
                 s if !s.is_empty() => Some(s),
                 _ => None