diff --git a/build.gradle.kts b/build.gradle.kts
index 9c80e75..19d9b17 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -29,6 +29,20 @@ tasks.test {
         events("passed", "skipped", "failed")
     }
 }
+
+tasks.jar {
+    manifest {
+        attributes["Main-Class"] = "fr.celticinfo.lox.LoxKt"
+    }
+
+    from(sourceSets.main.get().output)
+
+    dependsOn(configurations.runtimeClasspath)
+    from({
+        configurations.runtimeClasspath.get().filter { it.name.endsWith("jar") }.map { zipTree(it) }
+    })
+}
+
 kotlin {
     jvmToolchain(21)
 }
\ No newline at end of file
diff --git a/src/test/Fibonacci.lox b/src/test/Fibonacci.lox
new file mode 100644
index 0000000..ec2dc5a
--- /dev/null
+++ b/src/test/Fibonacci.lox
@@ -0,0 +1,6 @@
+fun fib(n) {
+    if (n <= 1) return n;
+    return fib(n - 1) + fib(n - 2);
+}
+
+print fib(35);
\ No newline at end of file