diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ee32dc..8d81ebd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## [Unreleased]
 
+### Changed
+
+- Requires `innmind/immutable:~5.16`
+- Requires `innmind/graphviz:~4.0`
+
 ### Fixed
 
 - PHP `8.4` deprecations
diff --git a/README.md b/README.md
index 23d8ed0..08e373f 100644
--- a/README.md
+++ b/README.md
@@ -40,9 +40,11 @@ Factory::build()
                 Render::of()($trace)
             ),
     )
+    ->unwrap()
     ->wait();
 ```
 
-**Note**: the svg rendered contains links to the files where call frames and exceptions occured, you can change the link by providing an instance of [`Link`](src/Link.php) to the `Render` object.
+> [!NOTE]
+> The svg rendered contains links to the files where call frames and exceptions occured, you can change the link by providing an instance of [`Link`](src/Link.php) to the `Render` object.
 
 Example of a rendered stack trace: ![](graph.svg)
diff --git a/composer.json b/composer.json
index 6edc564..1d13663 100644
--- a/composer.json
+++ b/composer.json
@@ -16,9 +16,9 @@
     },
     "require": {
         "php": "~8.2",
-        "innmind/immutable": "~4.1|~5.0",
-        "innmind/url": "~4.0",
-        "innmind/graphviz": "~3.1"
+        "innmind/immutable": "~5.16",
+        "innmind/url": "~4.4",
+        "innmind/graphviz": "~4.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/Render.php b/src/Render.php
index 17dc157..b9763c2 100644
--- a/src/Render.php
+++ b/src/Render.php
@@ -287,9 +287,12 @@ private function linkSource(
 
     /**
      * Remove special characters and escape backslashes
+     *
+     * @return non-empty-string
      */
     private function clean(string $name): string
     {
+        /** @var non-empty-string */
         return Str::of($name)
             ->replace("\x00", '') // remove the invisible character used in the name of anonymous classes
             ->replace('\\', '\\\\')