diff --git a/ext/src/main.rs b/ext/src/main.rs
index e4fb0ed..3c74790 100644
--- a/ext/src/main.rs
+++ b/ext/src/main.rs
@@ -5,6 +5,8 @@ use std::env;
 
 fn main() {
 
+    wasm_utils::init_log();
+
     let args = env::args().collect::<Vec<_>>();
     if args.len() != 3 {
         println!("Usage: {} input_file.wasm output_file.wasm", args[0]);
diff --git a/gas/src/main.rs b/gas/src/main.rs
index dd50747..27371da 100644
--- a/gas/src/main.rs
+++ b/gas/src/main.rs
@@ -5,6 +5,8 @@ use std::env;
 
 fn main() {
 
+    wasm_utils::init_log();
+
     let args = env::args().collect::<Vec<_>>();
     if args.len() != 3 {
         println!("Usage: {} input_file.wasm output_file.wasm", args[0]);
diff --git a/opt/src/main.rs b/opt/src/main.rs
index f947fed..893fb03 100644
--- a/opt/src/main.rs
+++ b/opt/src/main.rs
@@ -5,6 +5,8 @@ use std::env;
 
 fn main() {
 
+    wasm_utils::init_log();
+
     let args = env::args().collect::<Vec<_>>();
     if args.len() < 3 {
         println!("Usage: {} input_file.wasm output_file.wasm", args[0]);