diff --git a/Cargo.toml b/Cargo.toml
index 4d8bed7..c334859 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,10 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+egui = {version = "0.32.3", features = ["log"]}
 eframe = { version = "0.32.3" }
+log = "0.4.28"
+colog = "1.4.0"
 rfd = "*"
 json = "*"
 serde = { version = "*", features = ["derive"] }
diff --git a/src/main.rs b/src/main.rs
index 4eeaf40..0c905d7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,10 +2,12 @@ use std::path::PathBuf;
 
 use eframe::egui;
 use eframe::egui::KeyboardShortcut;
+use log::{info, warn, error};
 
 use billy_sheet::gui::SheetGui;
 
 fn main() -> eframe::Result {
+    colog::init();
     let options = eframe::NativeOptions {
         viewport: egui::ViewportBuilder::default().with_drag_and_drop(true),
         ..Default::default()
@@ -54,7 +56,7 @@ impl eframe::App for Gui {
                     if ui.button("Save in json").clicked() {
                         let path = std::path::Path::new("./sheet.json");
                         if let Err(error) = billy_sheet::sheet::write_sheet(path, &self.sheet) {
-                            println!("{error}");
+                            error!("{error}");
                         }
                     }
                 });
@@ -99,7 +101,19 @@ impl eframe::App for Gui {
             }
         });
         if let Some(file_path) = &self.picked_path {
-            println!("{}", file_path.to_str().unwrap_or_default());
+            if let Some(extension) = file_path.extension() {
+                info!("File selected : {}", file_path.display());
+                if extension == "json" {
+                    info!("File has json extension");
+                } else {
+                    warn!(
+                        "File has not .json: {}",
+                        extension.to_str().unwrap_or_default()
+                    );
+                }
+            } else {
+                error!("No extension for the file.");
+            }
             self.picked_path = None;
         }
     }