diff --git a/Cargo.toml b/Cargo.toml
index 360f9d55..aae43221 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -41,6 +41,10 @@ version = "5.2.0"
 [dependencies.ansi-parser]
 version = "0.9.1"
 
+[dependencies.sourceview]
+package = "sourceview5"
+version = "0.9.1"
+
 # development
 [patch.crates-io]
 # ggemini = { path = "ggemini" }
diff --git a/README.md b/README.md
index a2e003e9..1a6b3adf 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ GTK 4 / Libadwaita client written in Rust
   * [ ] `file://` - localhost browser
 * [ ] System
   * [ ] `config:` - low-level key/value settings editor
-  * [x] `view-source:` - page source viewer (where supported)
+  * [x] `source:` - page source viewer (where supported)
 
 ### Media types
 
@@ -129,13 +129,14 @@ GTK 4 / Libadwaita client written in Rust
 * GDK PixBuf `2.42`
 * Glib `2.80`
 * GTK `4.14`
+* GtkSourceView `5.14`
 * Libadwaita `1.5` (Ubuntu 24.04+)
 
 #### Debian
 
 ``` bash
 sudo apt install git curl build-essential\
-                 libgtk-4-dev libadwaita-1-dev\
+                 libgtk-4-dev libgtksourceview-5-dev libadwaita-1-dev\
                  libsqlite3-dev libssl-dev
 ```
 
@@ -143,7 +144,7 @@ sudo apt install git curl build-essential\
 
 ``` bash
 sudo dnf install git curl gcc\
-                 gtk4-devel libadwaita-devel\
+                 gtk4-devel gtksourceview5-devel libadwaita-devel\
                  sqlite-devel openssl-devel
 ```
 
diff --git a/src/app/browser/about.rs b/src/app/browser/about.rs
index 631c8761..370c1fe4 100644
--- a/src/app/browser/about.rs
+++ b/src/app/browser/about.rs
@@ -11,11 +11,17 @@ impl About {
         // Collect debug info
         let debug = &[
             format!(
-                "GTK {}.{}.{}",
+                "Gtk {}.{}.{}",
                 gtk::major_version(),
                 gtk::minor_version(),
                 gtk::micro_version()
             ),
+            format!(
+                "GtkSourceView {}.{}.{}",
+                sourceview::major_version(),
+                sourceview::minor_version(),
+                sourceview::micro_version()
+            ),
             format!("SQLite {}", sqlite::version()),
             // @TODO
         ];
diff --git a/src/app/browser/window/tab/item/page.rs b/src/app/browser/window/tab/item/page.rs
index 2f495667..95ca7655 100644
--- a/src/app/browser/window/tab/item/page.rs
+++ b/src/app/browser/window/tab/item/page.rs
@@ -198,8 +198,8 @@ impl Page {
         };
 
         // Detect source view mode, return `request` string prepared for route
-        let (request, is_view_source) = match request.strip_prefix("view-source:") {
-            Some(postfix) => (gformat!("{}", postfix.to_string()), true),
+        let (request, is_view_source) = match request.strip_prefix("source:") {
+            Some(postfix) => (GString::from(postfix), true),
             None => (request, false),
         };
 
diff --git a/src/app/browser/window/tab/item/page/content/text/source.rs b/src/app/browser/window/tab/item/page/content/text/source.rs
index 44e0694d..bb8e3235 100644
--- a/src/app/browser/window/tab/item/page/content/text/source.rs
+++ b/src/app/browser/window/tab/item/page/content/text/source.rs
@@ -1,22 +1,29 @@
-use gtk::{TextBuffer, TextView};
-
+use sourceview::{Buffer, StyleScheme, View};
 const MARGIN: i32 = 8;
 
 pub struct Source {
-    pub text_view: TextView,
+    pub text_view: View,
 }
 
 impl Source {
     pub fn new(data: &str) -> Self {
         Self {
-            text_view: TextView::builder()
+            text_view: View::builder()
                 .bottom_margin(MARGIN)
-                .buffer(&TextBuffer::builder().text(data).build())
+                .buffer(
+                    &Buffer::builder()
+                        .text(data)
+                        .style_scheme(&StyleScheme::builder().build()) // adaptive
+                        .highlight_syntax(true)
+                        .build(),
+                )
                 .cursor_visible(false)
                 .editable(false)
                 .left_margin(MARGIN)
                 .monospace(true)
                 .right_margin(MARGIN)
+                .show_line_marks(true)
+                .show_line_numbers(true)
                 .top_margin(MARGIN)
                 .vexpand(true)
                 .build(),