diff --git a/frontend/index.html b/frontend/index.html
index c6d493f..3f4424d 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -26,6 +26,8 @@
     --warn-hover: #eab308;
     --warning-bg: #78350f;
     --error: #f87171;
+    --danger: #b91c1c;
+    --danger-hover: #dc2626;
     --code-bg: #1e293b;
     --scrollbar-track: #0f172a;
     --scrollbar-thumb: #334155;
@@ -57,6 +59,8 @@
     --warn-hover: #d97706;
     --warning-bg: #fef3c7;
     --error: #dc2626;
+    --danger: #dc2626;
+    --danger-hover: #b91c1c;
     --code-bg: #f3f4f6;
     --scrollbar-track: #fafafa;
     --scrollbar-thumb: #d1d5db;
@@ -106,8 +110,8 @@ body { font: 14px/1.5 system-ui, sans-serif; background: var(--bg); color: var(-
 .trace-topbar .filter-label { color: var(--text-muted); font-size: 13px; white-space: nowrap; }
 .trace-topbar button { padding: 8px 16px; background: var(--accent); color: #fff; border: none; border-radius: 4px; cursor: pointer; font-weight: 600; }
 .trace-topbar button:hover { background: var(--accent-hover); }
-.trace-topbar button.stop { background: var(--bg-input); color: var(--text); }
-.trace-topbar button.stop:hover { background: var(--bg-panel); }
+.trace-topbar button.stop { background: var(--danger); color: #fff; }
+.trace-topbar button.stop:hover { background: var(--danger-hover); }
 .trace-topbar button.connect { background: var(--warn); color: #0f172a; }
 .trace-topbar button.connect:hover { background: var(--warn-hover); }
 .trace-main { display: flex; flex: 1; overflow: hidden; }
@@ -2514,7 +2518,7 @@ function onFilterChange() {
 }
 
 // ──────────────────── Versioning ────────────────────
-const PWA_VERSION = '1.22.2';
+const PWA_VERSION = '1.22.3';
 const MIN_SERVER_VERSION = '1.0.0';
 
 function parseVersion(v) {
diff --git a/frontend/sw.js b/frontend/sw.js
index 719d5c5..f157ed8 100644
--- a/frontend/sw.js
+++ b/frontend/sw.js
@@ -1,4 +1,4 @@
-const CACHE = 'simtrace-analyser-v34';
+const CACHE = 'simtrace-analyser-v35';
 
 const PRECACHE = [
     'index.html',
diff --git a/pyproject.toml b/pyproject.toml
index 83f6118..b776388 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.backends._legacy:_Backend"
 
 [project]
 name = "simtrace2-pysniff"
-version = "1.22.2"
+version = "1.22.3"
 description = "Python-based sniffing tool for SIMtrace2 hardware (SIM card communication sniffer)"
 readme = {file = "README.md", content-type = "text/markdown"}
 license = {text = "GPL-2.0-or-later"}
diff --git a/simtrace2_pysniff/__init__.py b/simtrace2_pysniff/__init__.py
index 580d50c..ba9090d 100644
--- a/simtrace2_pysniff/__init__.py
+++ b/simtrace2_pysniff/__init__.py
@@ -6,7 +6,7 @@ from .gsmtap import GsmtapSender, GsmtapReceiver
 from .pcap import PcapWriter
 from .dump import FileDumper, format_message
 
-__version__ = '1.22.2'
+__version__ = '1.22.3'
 __all__ = [
     'SniffSession',
     'DeviceDisconnected',
diff --git a/tests/test_pcap_import.py b/tests/test_pcap_import.py
index f676dbf..e03d1d0 100644
--- a/tests/test_pcap_import.py
+++ b/tests/test_pcap_import.py
@@ -224,7 +224,7 @@ class TestImportEndpoint(unittest.TestCase):
 class TestVersion(unittest.TestCase):
     def test_package_version(self):
         from simtrace2_pysniff import __version__
-        self.assertEqual(__version__, '1.22.2')
+        self.assertEqual(__version__, '1.22.3')
 
     def test_status_includes_version(self):
         import os