diff --git a/homeassistant/components/knx/manifest.json b/homeassistant/components/knx/manifest.json
index 508603ec66e..2f466938415 100644
--- a/homeassistant/components/knx/manifest.json
+++ b/homeassistant/components/knx/manifest.json
@@ -11,7 +11,7 @@
   "loggers": ["xknx", "xknxproject"],
   "quality_scale": "silver",
   "requirements": [
-    "xknx==3.8.0",
+    "xknx==3.9.0",
     "xknxproject==3.8.2",
     "knx-frontend==2025.8.24.205840"
   ],
diff --git a/requirements_all.txt b/requirements_all.txt
index aaf14374e93..ac3b4944cd4 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -3137,7 +3137,7 @@ xbox-webapi==2.1.0
 xiaomi-ble==1.2.0
 
 # homeassistant.components.knx
-xknx==3.8.0
+xknx==3.9.0
 
 # homeassistant.components.knx
 xknxproject==3.8.2
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 95eaa5bcff9..93d648ead33 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -2590,7 +2590,7 @@ xbox-webapi==2.1.0
 xiaomi-ble==1.2.0
 
 # homeassistant.components.knx
-xknx==3.8.0
+xknx==3.9.0
 
 # homeassistant.components.knx
 xknxproject==3.8.2