diff --git a/.gitignore b/.gitignore
index 33419bc..c109696 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,7 @@
 .vscode/
 build/
-protocols/
\ No newline at end of file
+protocols/
+.clangd/
+.direnv/
+.cache/
+compile_commands.json
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4dfb8a9..99206e8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -85,10 +85,17 @@ function(protocol protoPath protoName external)
   endif()
 endfunction()
 
+pkg_check_modules(hyprland_protocols_dep REQUIRED IMPORTED_TARGET hyprland-protocols>=0.4.0)
+pkg_get_variable(HYPRLAND_PROTOCOLS hyprland-protocols pkgdatadir)
+message(STATUS "hyprland-protocols dependency set to ${HYPRLAND_PROTOCOLS}")
+
 make_directory(${CMAKE_SOURCE_DIR}/protocols) # we don't ship any custom ones so
                                               # the dir won't be there
+
 protocol("staging/ext-idle-notify/ext-idle-notify-v1.xml" "ext-idle-notify-v1"
          false)
+protocol("${HYPRLAND_PROTOCOLS}/protocols/hyprland-lock-notify-v1.xml" "hyprland-lock-notify-v1"
+         true)
 
 # Installation
 install(TARGETS hypridle)
diff --git a/flake.lock b/flake.lock
index 74ad2f0..6f56a40 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,27 @@
 {
   "nodes": {
+    "hyprland-protocols": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "systems": [
+          "systems"
+        ]
+      },
+      "locked": {
+        "lastModified": 1737053288,
+        "narHash": "sha256-RV6n5M5kewrOfpDMdVzj5oVRhVHiZpjDcaOHGYMcnRo=",
+        "rev": "5b17e27fde2155eeb96ff487b7721e5df0a72296",
+        "revCount": 30,
+        "type": "git",
+        "url": "file:///home/max/desk/hyprland-protocols"
+      },
+      "original": {
+        "type": "git",
+        "url": "file:///home/max/desk/hyprland-protocols"
+      }
+    },
     "hyprlang": {
       "inputs": {
         "hyprutils": [
@@ -67,6 +89,7 @@
     },
     "root": {
       "inputs": {
+        "hyprland-protocols": "hyprland-protocols",
         "hyprlang": "hyprlang",
         "hyprutils": "hyprutils",
         "nixpkgs": "nixpkgs",
diff --git a/flake.nix b/flake.nix
index 24364c7..9dc4a54 100644
--- a/flake.nix
+++ b/flake.nix
@@ -17,6 +17,12 @@
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.systems.follows = "systems";
     };
+
+    hyprland-protocols = {
+      url = "github:hyprwm/hyprland-protocols";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.systems.follows = "systems";
+    };
   };
 
   outputs = {
diff --git a/nix/default.nix b/nix/default.nix
index 5238809..f3b5a93 100644
--- a/nix/default.nix
+++ b/nix/default.nix
@@ -2,9 +2,10 @@
   lib,
   stdenv,
   cmake,
-  pkg-config,
+  hyprland-protocols,
   hyprlang,
   hyprutils,
+  pkg-config,
   sdbus-cpp,
   systemd,
   wayland,
@@ -24,6 +25,7 @@ stdenv.mkDerivation {
   ];
 
   buildInputs = [
+    hyprland-protocols
     hyprlang
     hyprutils
     sdbus-cpp
diff --git a/nix/overlays.nix b/nix/overlays.nix
index c3d5651..bde1308 100644
--- a/nix/overlays.nix
+++ b/nix/overlays.nix
@@ -13,6 +13,7 @@ in {
   default = inputs.self.overlays.hypridle;
 
   hypridle = lib.composeManyExtensions [
+    inputs.hyprland-protocols.overlays.default
     inputs.hyprlang.overlays.default
     inputs.hyprutils.overlays.default
     inputs.self.overlays.sdbuscpp
diff --git a/src/core/Hypridle.cpp b/src/core/Hypridle.cpp
index 8c85e9d..038669f 100644
--- a/src/core/Hypridle.cpp
+++ b/src/core/Hypridle.cpp
@@ -1,6 +1,8 @@
 #include "Hypridle.hpp"
 #include "../helpers/Log.hpp"
 #include "../config/ConfigManager.hpp"
+#include "ext-idle-notify-v1-protocol.h"
+#include "hyprland-lock-notify-v1-protocol.h"
 #include "signal.h"
 #include <sys/wait.h>
 #include <sys/poll.h>
@@ -44,6 +46,19 @@ inline const ext_idle_notification_v1_listener idleListener = {
     .resumed = handleResumed,
 };
 
+void handleLocked(void* data, hyprland_lock_notification_v1* hyprland_lock_notification_v1) {
+    Debug::log(LOG, "Locked");
+}
+
+void handleUnlocked(void* data, hyprland_lock_notification_v1* hyprland_lock_notification_v1) {
+    Debug::log(LOG, "Unlocked");
+}
+
+inline const hyprland_lock_notification_v1_listener lockListener = {
+    .locked   = handleLocked,
+    .unlocked = handleUnlocked,
+};
+
 void CHypridle::run() {
     m_sWaylandState.registry = wl_display_get_registry(m_sWaylandState.display);
 
@@ -73,6 +88,12 @@ void CHypridle::run() {
 
     wl_display_roundtrip(m_sWaylandState.display);
 
+    if (m_sWaylandState.lockNotifier) {
+        m_sWaylandState.lockNotification = hyprland_lock_notifier_v1_get_lock_notification(m_sWaylandState.lockNotifier);
+
+        hyprland_lock_notification_v1_add_listener(m_sWaylandState.lockNotification, &lockListener, nullptr);
+    }
+
     Debug::log(LOG, "wayland done, registering dbus");
 
     try {
@@ -194,6 +215,9 @@ void CHypridle::onGlobal(void* data, struct wl_registry* registry, uint32_t name
     if (IFACE == ext_idle_notifier_v1_interface.name) {
         m_sWaylandIdleState.notifier = (ext_idle_notifier_v1*)wl_registry_bind(registry, name, &ext_idle_notifier_v1_interface, version);
         Debug::log(LOG, "   > Bound to {} v{}", IFACE, version);
+    } else if (IFACE == hyprland_lock_notifier_v1_interface.name) {
+        m_sWaylandState.lockNotifier = (hyprland_lock_notifier_v1*)wl_registry_bind(registry, name, &hyprland_lock_notifier_v1_interface, version);
+        Debug::log(LOG, "   > Bound to {} v{}", IFACE, version);
     } else if (IFACE == wl_seat_interface.name) {
         if (m_sWaylandState.seat) {
             Debug::log(WARN, "Hypridle does not support multi-seat configurations. Only binding to the first seat.");
@@ -295,6 +319,16 @@ void CHypridle::onResumed(SIdleListener* pListener) {
     spawn(pListener->onRestore);
 }
 
+void CHypridle::onLocked() {
+    Debug::log(LOG, "Locked");
+    m_isLocked = true;
+
+    if (const auto* const PLOCKCMD = (Hyprlang::STRING const*)g_pConfigManager->getValuePtr("general:on_lock_cmd"); !PLOCKCMD->empty()) {
+        Debug::log(LOG, "Running {}", *PLOCKCMD);
+        spawn(*PLOCKCMD);
+    }
+}
+
 void CHypridle::onInhibit(bool lock) {
     m_iInhibitLocks += lock ? 1 : -1;
 
diff --git a/src/core/Hypridle.hpp b/src/core/Hypridle.hpp
index e5a131a..2b8d59f 100644
--- a/src/core/Hypridle.hpp
+++ b/src/core/Hypridle.hpp
@@ -7,6 +7,7 @@
 #include <condition_variable>
 
 #include "ext-idle-notify-v1-protocol.h"
+#include "hyprland-lock-notify-v1-protocol.h"
 
 class CHypridle {
   public:
@@ -31,6 +32,9 @@ class CHypridle {
     void               onIdled(SIdleListener*);
     void               onResumed(SIdleListener*);
 
+    void               onLocked();
+    void               onUnlocked();
+
     void               onInhibit(bool lock);
 
     SDbusInhibitCookie getDbusInhibitCookie(uint32_t cookie);
@@ -44,12 +48,15 @@ class CHypridle {
 
     bool    m_bTerminate    = false;
     bool    isIdled         = false;
+    bool    m_isLocked      = false;
     int64_t m_iInhibitLocks = 0;
 
     struct {
-        wl_display*  display  = nullptr;
-        wl_registry* registry = nullptr;
-        wl_seat*     seat     = nullptr;
+        wl_display*                    display          = nullptr;
+        wl_registry*                   registry         = nullptr;
+        wl_seat*                       seat             = nullptr;
+        hyprland_lock_notifier_v1*     lockNotifier     = nullptr;
+        hyprland_lock_notification_v1* lockNotification = nullptr;
     } m_sWaylandState;
 
     struct {