diff --git a/watchers/src/watchers/kwin_window.js b/watchers/src/watchers/kwin_window.js
index 54f9307..b30f913 100644
--- a/watchers/src/watchers/kwin_window.js
+++ b/watchers/src/watchers/kwin_window.js
@@ -12,7 +12,7 @@ function send(client) {
     );
 }
 
-workspace.windowActivated.connect(function(client){
+let handler = function(client){
     if (client === null) {
         return;
     }
@@ -26,4 +26,12 @@ workspace.windowActivated.connect(function(client){
     }
 
     send(client);
-});
+};
+
+let activationEvent = workspace.windowActivated ? workspace.windowActivated : workspace.clientActivated;
+if (workspace.windowActivated) {
+    workspace.windowActivated.connect(handler);
+} else {
+    // KDE version < 6
+    workspace.clientActivated.connect(handler);
+}
diff --git a/watchers/src/watchers/kwin_window.rs b/watchers/src/watchers/kwin_window.rs
index 5b228ae..44ea883 100644
--- a/watchers/src/watchers/kwin_window.rs
+++ b/watchers/src/watchers/kwin_window.rs
@@ -92,10 +92,16 @@ impl KWinScript {
 
     async fn start(&self, script_number: i32) -> anyhow::Result<()> {
         debug!("Starting KWin script {script_number}");
+
+        let path = if self.get_major_version().await < 6 {
+            format!("/{script_number}")
+        } else {
+            format!("/Scripting/Script{script_number}")
+        };
         self.dbus_connection
             .call_method(
                 Some("org.kde.KWin"),
-                format!("/Scripting/Script{script_number}"),
+                path,
                 Some("org.kde.kwin.Script"),
                 "run",
                 &(),
@@ -104,6 +110,61 @@ impl KWinScript {
             .with_context(|| "Error on starting the script")?;
         Ok(())
     }
+
+    async fn get_major_version(&self) -> i8 {
+        if let Ok(version) = Self::get_major_version_from_env() {
+            debug!("KWin version from KDE_SESSION_VERSION: {version}");
+
+            version
+        } else {
+            self.get_major_version_from_dbus()
+                .await
+                .unwrap_or_else(|e| {
+                    error!("Failed to get KWin version: {e}");
+                    5
+                })
+        }
+    }
+
+    fn get_major_version_from_env() -> anyhow::Result<i8> {
+        env::var("KDE_SESSION_VERSION")?
+            .parse::<i8>()
+            .map_err(std::convert::Into::into)
+    }
+
+    async fn get_major_version_from_dbus(&self) -> anyhow::Result<i8> {
+        let support_information: String = self
+            .dbus_connection
+            .call_method(
+                Some("org.kde.KWin"),
+                "/KWin",
+                Some("org.kde.KWin"),
+                "supportInformation",
+                &(),
+            )
+            .await?
+            .body::<String>()?;
+
+        // find a string like "KWin version: 5.27.8" and extract the version number from it:
+        let version = support_information
+            .lines()
+            .find(|line| line.starts_with("KWin version: "))
+            .ok_or(anyhow!("KWin version not found"))?
+            .split_whitespace()
+            .last()
+            .ok_or(anyhow!("KWin version is invalid"))?;
+
+        // Extract the major version number from the version number like "5.27.8":
+        let major_version = version
+            .split('.')
+            .next()
+            .ok_or(anyhow!("KWin version is invalid: {version}"))?
+            .parse::<i8>()?;
+
+        debug!("KWin version from DBus: {version}, major version: {major_version}");
+
+        Ok(major_version)
+    }
 }
 
 impl Drop for KWinScript {