diff --git a/public/scripts/network.js b/public/scripts/network.js
index 55fdc89..01eb27d 100644
--- a/public/scripts/network.js
+++ b/public/scripts/network.js
@@ -893,11 +893,11 @@ class Events {
         window.dispatchEvent(new CustomEvent(type, { detail: detail }));
     }
 
-    static on(type, callback) {
-        return window.addEventListener(type, callback, false);
+    static on(type, callback, options = false) {
+        return window.addEventListener(type, callback, options);
     }
 
-    static off(type, callback) {
-        return window.removeEventListener(type, callback, false);
+    static off(type, callback, options = false) {
+        return window.removeEventListener(type, callback, options);
     }
 }
diff --git a/public/scripts/ui.js b/public/scripts/ui.js
index 62c1f83..340b22b 100644
--- a/public/scripts/ui.js
+++ b/public/scripts/ui.js
@@ -241,7 +241,7 @@ class PeersUI {
 
             const _callback = (e) => this._sendClipboardData(e, files, text);
             Events.on('paste-pointerdown', _callback);
-            Events.on('deactivate-paste-mode', _ => this._deactivatePasteMode(_callback));
+            Events.on('deactivate-paste-mode', _ => this._deactivatePasteMode(_callback), { once: true });
 
             this.$cancelPasteModeBtn.removeAttribute('hidden');
 
diff --git a/public_included_ws_fallback/scripts/network.js b/public_included_ws_fallback/scripts/network.js
index 4c5b255..b805654 100644
--- a/public_included_ws_fallback/scripts/network.js
+++ b/public_included_ws_fallback/scripts/network.js
@@ -974,11 +974,11 @@ class Events {
         window.dispatchEvent(new CustomEvent(type, { detail: detail }));
     }
 
-    static on(type, callback) {
-        return window.addEventListener(type, callback, false);
+    static on(type, callback, options = false) {
+        return window.addEventListener(type, callback, options);
     }
 
-    static off(type, callback) {
-        return window.removeEventListener(type, callback, false);
+    static off(type, callback, options = false) {
+        return window.removeEventListener(type, callback, options);
     }
 }
diff --git a/public_included_ws_fallback/scripts/ui.js b/public_included_ws_fallback/scripts/ui.js
index b1f666b..0227167 100644
--- a/public_included_ws_fallback/scripts/ui.js
+++ b/public_included_ws_fallback/scripts/ui.js
@@ -241,7 +241,7 @@ class PeersUI {
 
             const _callback = (e) => this._sendClipboardData(e, files, text);
             Events.on('paste-pointerdown', _callback);
-            Events.on('deactivate-paste-mode', _ => this._deactivatePasteMode(_callback));
+            Events.on('deactivate-paste-mode', _ => this._deactivatePasteMode(_callback), { once: true });
 
             this.$cancelPasteModeBtn.removeAttribute('hidden');