diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9427c25..71a7e01 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [0.2.0]
+
+### Added
+
+- Ignoring extensions during unpacking
+
 ## [0.1.0]
 
 Initial version.
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
index acf7af9..0a8f21e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "lwa_unity_unpack"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2021"
 repository = "https://github.com/Leinnan/lwa_unity_unpack"
 homepage = "https://github.com/Leinnan/lwa_unity_unpack"
diff --git a/README.md b/README.md
index e11128b..105d97a 100644
--- a/README.md
+++ b/README.md
@@ -16,12 +16,14 @@ Options:
   -i, --input <INPUT>              .unitypackage file to extract
   -o, --output <OUTPUT>            target directory
   -f, --fbx-to-gltf <FBX_TO_GLTF>  optional- path to the tool that will auto convert fbx files to gltf during unpacking
+      --ignore-extensions <IGNORE_EXTENSIONS>
+          optional- extensions that will be ignored during unpacking
   -h, --help                       Print help
   -V, --version                    Print version
-  ```
+```
 
 
-`lwa_unity_unpack -i "C:\\PROJECTS\\lwa_unity_unpack\\POLYGON_Snow_Kit_Unity_2020_3_v1_4.unitypackage" -o "output" -f "C:\\tools\\FBX2glTF.exe"`
+`lwa_unity_unpack -i "C:\\PROJECTS\\lwa_unity_unpack\\POLYGON_Snow_Kit_Unity_2020_3_v1_4.unitypackage" -o "output" -f "C:\\tools\\FBX2glTF.exe"  --ignore-extensions "mat" --ignore-extensions "prefab"`
 
 
 ## Install
diff --git a/src/main.rs b/src/main.rs
index 52544ec..615e13f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -26,6 +26,10 @@ struct Args {
     /// optional- path to the tool that will auto convert fbx files to gltf during unpacking
     #[arg(short, long)]
     fbx_to_gltf: Option<PathBuf>,
+
+    /// optional- extensions that will be ignored during unpacking
+    #[arg(long, action = clap::ArgAction::Append)]
+    ignore_extensions: Option<Vec<String>>,
 }
 
 pub fn extract_archive(archive_path: &Path, extract_to: &Path) -> io::Result<()> {
@@ -37,7 +41,8 @@ pub fn extract_archive(archive_path: &Path, extract_to: &Path) -> io::Result<()>
 }
 
 fn main() {
-    let args = Args::parse();
+    let args : Args = Args::parse();
+    let ignored_extensions = args.ignore_extensions.unwrap_or(vec![]);
     let archive_path = Path::new(&args.input);
     let tmp_dir = Path::new("./tmp_dir");
     let output_dir = Path::new(&args.output);
@@ -63,7 +68,8 @@ fn main() {
         let root_file = entry.path();
         let asset = entry.file_name().into_string().unwrap();
         if root_file.is_dir() {
-            let mut real_path = String::new();
+            let mut real_path= String::new() ;
+            let mut extension = None;
             let mut has_asset = false;
             for sub_entry in fs::read_dir(root_file.clone()).unwrap() {
                 let sub_entry = sub_entry.unwrap();
@@ -74,14 +80,19 @@ fn main() {
                     let buf_reader = BufReader::new(file);
                     let line = buf_reader.lines().next();
                     match line {
-                        Some(Ok(path)) => real_path = path,
+                        Some(Ok(path)) => {
+                            real_path = path;
+                            if let Some(e) = Path::new(&real_path).extension().and_then(OsStr::to_str) {
+                                extension = Some(String::from(e));
+                            }
+                        },
                         _ => continue,
                     }
                 } else if file_name == "asset" {
                     has_asset = true;
                 }
             }
-            if has_asset {
+            if has_asset && !ignored_extensions.contains(&extension.unwrap_or_default()){
                 mapping.insert(asset, real_path);
             }
         }