diff --git a/src/compiler.rs b/src/compiler.rs
index acc537c..3319097 100644
--- a/src/compiler.rs
+++ b/src/compiler.rs
@@ -12,17 +12,17 @@ use wat;
 
 #[derive(Parser, Debug)]
 pub struct Args {
-    pub input_file: String,
+    pub input_file: path::PathBuf,
 
     #[arg(short, long, default_value = "./wasm.o")]
-    pub output_file: String,
+    pub output_file: path::PathBuf,
 }
 
 /// Receive a path to a Wasm binary or WAT and compile it into ELF binary.
 pub fn compile_wasm_from_file(args: &Args) -> Result<()> {
     // Load bytes as either *.wat or *.wasm
-    log::info!("input: {}", args.input_file);
-    let buf: Vec<u8> = std::fs::read(args.input_file.as_str()).expect("error read file");
+    log::info!("input: {}", args.input_file.as_path().display());
+    let buf: Vec<u8> = std::fs::read(&args.input_file).expect("error read file");
 
     // If input is *.wat, convert it into *wasm
     // If input is *.wasm, do nothing
@@ -40,7 +40,7 @@ pub fn compile_wasm(wasm: &[u8], args: &Args) -> Result<()> {
     let builder = context.create_builder();
     let (inkwell_types, inkwell_insts) = init_inkwell(&context, &module);
     let mut environment = Environment {
-        output_file: args.output_file.as_str(),
+        output_file: args.output_file.as_path(),
         context: &context,
         module: &module,
         builder,
diff --git a/src/environment.rs b/src/environment.rs
index 978eaf3..764437e 100644
--- a/src/environment.rs
+++ b/src/environment.rs
@@ -9,6 +9,7 @@ use inkwell::{
     types::{BasicTypeEnum, FunctionType},
     values::{BasicValueEnum, FunctionValue, GlobalValue, IntValue},
 };
+use std::path::Path;
 
 use crate::inkwell::{InkwellInsts, InkwellTypes};
 use crate::insts::control::{ControlFrame, UnreachableReason};
@@ -25,7 +26,7 @@ pub enum Global<'a> {
 
 pub struct Environment<'a, 'b> {
     // Output dir
-    pub output_file: &'b str,
+    pub output_file: &'b Path,
 
     // Inkwell code generator
     pub context: &'a Context,
diff --git a/tests/control.rs b/tests/control.rs
index 902a72b..5c25110 100644
--- a/tests/control.rs
+++ b/tests/control.rs
@@ -4,8 +4,8 @@ use wasker::compiler;
 fn example() {
     let wat = "./tests/wat/block.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -14,8 +14,8 @@ fn example() {
 fn block() {
     let wat = "./tests/wat/block.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -24,8 +24,8 @@ fn block() {
 fn ret() {
     let wat = "./tests/wat/return.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -34,8 +34,8 @@ fn ret() {
 fn call() {
     let wat = "./tests/wat/call.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -44,8 +44,8 @@ fn call() {
 fn call_indirect() {
     let wat = "./tests/wat/call_indirect.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -54,8 +54,8 @@ fn call_indirect() {
 fn select() {
     let wat = "./tests/wat/select.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -64,8 +64,8 @@ fn select() {
 fn br() {
     let wat = "./tests/wat/br.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -74,8 +74,8 @@ fn br() {
 fn br_table() {
     let wat = "./tests/wat/br_table.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -84,8 +84,8 @@ fn br_table() {
 fn br_if() {
     let wat = "./tests/wat/br_if.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -94,8 +94,8 @@ fn br_if() {
 fn iff() {
     let wat = "./tests/wat/if.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -104,8 +104,8 @@ fn iff() {
 fn loopp() {
     let wat = "./tests/wat/loop.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -114,8 +114,8 @@ fn loopp() {
 fn switch() {
     let wat = "./tests/wat/switch.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -124,8 +124,8 @@ fn switch() {
 fn bulk() {
     let wat = "./tests/wat/bulk.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
diff --git a/tests/local.rs b/tests/local.rs
index ce09e93..466a57f 100644
--- a/tests/local.rs
+++ b/tests/local.rs
@@ -4,8 +4,8 @@ use wasker::compiler;
 fn local_get() {
     let wat = "./tests/wat/local_get.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -14,8 +14,8 @@ fn local_get() {
 fn global() {
     let wat = "./tests/wat/global.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
diff --git a/tests/memory.rs b/tests/memory.rs
index e540c4c..4ea20f7 100644
--- a/tests/memory.rs
+++ b/tests/memory.rs
@@ -4,8 +4,8 @@ use wasker::compiler;
 fn memory_size() {
     let wat = "./tests/wat/memory_size.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -14,8 +14,8 @@ fn memory_size() {
 fn memory_copy() {
     let wat = "./tests/wat/memory_copy.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -24,8 +24,8 @@ fn memory_copy() {
 fn memory_fill() {
     let wat = "./tests/wat/memory_fill.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -34,8 +34,8 @@ fn memory_fill() {
 fn endianness() {
     let wat = "./tests/wat/endianness.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -44,8 +44,8 @@ fn endianness() {
 fn address32() {
     let wat = "./tests/wat/address32.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -54,8 +54,8 @@ fn address32() {
 fn address64() {
     let wat = "./tests/wat/address64.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -64,8 +64,8 @@ fn address64() {
 fn align() {
     let wat = "./tests/wat/align.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
diff --git a/tests/numeric.rs b/tests/numeric.rs
index b7bd046..f330935 100644
--- a/tests/numeric.rs
+++ b/tests/numeric.rs
@@ -4,8 +4,8 @@ use wasker::compiler;
 fn i64() {
     let wat = "./tests/wat/i64.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -14,8 +14,8 @@ fn i64() {
 fn convert() {
     let wat = "./tests/wat/convert.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -24,8 +24,8 @@ fn convert() {
 fn f64() {
     let wat = "./tests/wat/f64.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -34,8 +34,8 @@ fn f64() {
 fn f64_cmp() {
     let wat = "./tests/wat/f64_cmp.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
@@ -44,8 +44,8 @@ fn f64_cmp() {
 fn f64_bitwise() {
     let wat = "./tests/wat/f64_bitwise.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
diff --git a/tests/rust.rs b/tests/rust.rs
index d40cd7f..17c10d9 100644
--- a/tests/rust.rs
+++ b/tests/rust.rs
@@ -4,8 +4,8 @@ use wasker::compiler;
 fn rust() {
     let wat = "./helloworld.wat";
     let args = compiler::Args {
-        input_file: wat.to_string(),
-        output_file: "/tmp/wasm.o".to_string(),
+        input_file: wat.into(),
+        output_file: "/tmp/wasm.o".into(),
     };
     compiler::compile_wasm_from_file(&args).expect("fail compile");
 }
diff --git a/tests/spec.rs b/tests/spec.rs
index 188b048..f41ddd2 100644
--- a/tests/spec.rs
+++ b/tests/spec.rs
@@ -32,8 +32,8 @@ fn _run_spec_test(testname: &str) {
                 // Compile test
                 println!("Compile Module {:?}", name);
                 let args = compiler::Args {
-                    input_file: "tmp.wasm".to_string(),
-                    output_file: "/tmp/wasm.o".to_string(),
+                    input_file: "tmp.wasm".into(),
+                    output_file: "/tmp/wasm.o".into(),
                 };
                 compiler::compile_wasm(&module_binary, &args).expect("compile failed");
             }