diff --git a/src/main.rs b/src/main.rs
index 7357cad..85e517c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,6 +5,10 @@ use anime_launcher_sdk::config;
 pub mod i18n;
 pub mod ui;
 
+pub const APP_ID: &str = "moe.launcher.an-anime-game-launcher-gtk";
+pub const APP_VERSION: &str = env!("CARGO_PKG_VERSION");
+pub const APP_DEBUG: bool = cfg!(debug_assertions);
+
 fn main() {
     tracing_subscriber::fmt()
         .with_span_events(tracing_subscriber::fmt::format::FmtSpan::FULL)
diff --git a/src/ui/about.rs b/src/ui/about.rs
index ae227b4..e313f36 100644
--- a/src/ui/about.rs
+++ b/src/ui/about.rs
@@ -1,9 +1,12 @@
 use relm4::prelude::*;
 
 use gtk::prelude::*;
-use adw::prelude::*;
 
-use crate::i18n::tr;
+use anime_launcher_sdk::anime_game_core::{VERSION as CORE_VERSION, curl_sys};
+
+lazy_static::lazy_static! {
+    static ref CURL_INFO: curl_sys::Version = curl_sys::Version::get();
+}
 
 pub struct AboutDialog {
     visible: bool
@@ -29,6 +32,43 @@ impl SimpleComponent for AboutDialog {
             set_website: "https://github.com/an-anime-team/an-anime-game-launcher-gtk",
             set_issue_url: "https://github.com/an-anime-team/an-anime-game-launcher-gtk/issues",
 
+            set_license_type: gtk::License::Gpl30,
+
+            set_version: &{
+                // Debug build & build's version doesn't contain any suffix (-dev, -beta, etc)
+                if crate::APP_DEBUG && !crate::APP_VERSION.contains('-') {
+                    format!("{}-dev", crate::APP_VERSION)
+                }
+                
+                else {
+                    crate::APP_VERSION.to_string()
+                }
+            },
+
+            set_developers: &[
+                "Nikita Podvirnyy https://github.com/krypt0nn"
+            ],
+
+            add_credit_section: (Some("Logo"), &[
+                "@nightany https://pinterest.com/pin/356206651788051017"
+            ]),
+
+            add_credit_section: (Some("An Anime Team"), &[
+                "@Marie https://github.com/Mar0xy",
+                "@lane https://github.com/laurinneff"
+            ]),
+
+            set_debug_info: &[
+                format!("Anime Game core library version: {CORE_VERSION}"),
+                format!("Curl version: {}", CURL_INFO.version()),
+                format!("SSL version: {}", CURL_INFO.ssl_version().unwrap_or("?")),
+                String::new(),
+                format!("GTK version: {}.{}.{}", gtk::major_version(), gtk::minor_version(), gtk::micro_version()),
+                format!("Libadwaita version: {}.{}.{}", adw::major_version(), adw::minor_version(), adw::micro_version()),
+                format!("Pango version: {}", gtk::pango::version_string()),
+                format!("Cairo version: {}", gtk::cairo::version_string()),
+            ].join("\n"),
+
             set_modal: true,
             set_hide_on_close: true,
 
diff --git a/src/ui/main.rs b/src/ui/main.rs
index 9123cf8..2dbdac2 100644
--- a/src/ui/main.rs
+++ b/src/ui/main.rs
@@ -127,6 +127,10 @@ impl SimpleComponent for App {
     ) -> ComponentParts<Self> {
         let widgets = view_output!();
 
+        if crate::APP_DEBUG {
+            widgets.main_window.add_css_class("devel");
+        }
+
         let about_dialog_broker: MessageBroker<AboutDialog> = MessageBroker::new();
 
         let model = App {