diff --git a/homematic/CHANGELOG.md b/homematic/CHANGELOG.md
index 8aa83b9..aa9d343 100644
--- a/homematic/CHANGELOG.md
+++ b/homematic/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 11.0.5
+
+- Skip HmIP firmware update for udev path
+- Persist certificate
+
 ## 11.0.4
 
 - Fix template for hmip
diff --git a/homematic/config.json b/homematic/config.json
index 8a1942b..a67006f 100644
--- a/homematic/config.json
+++ b/homematic/config.json
@@ -1,6 +1,6 @@
 {
   "name": "HomeMatic CCU",
-  "version": "11.0.4",
+  "version": "11.0.5",
   "slug": "homematic",
   "description": "HomeMatic central based on OCCU",
   "url": "https://github.com/home-assistant/hassio-addons/tree/master/homematic",
diff --git a/homematic/rootfs/etc/cont-init.d/certs.sh b/homematic/rootfs/etc/cont-init.d/certs.sh
index 2f153f3..a3ef2d5 100644
--- a/homematic/rootfs/etc/cont-init.d/certs.sh
+++ b/homematic/rootfs/etc/cont-init.d/certs.sh
@@ -2,4 +2,10 @@
 # ==============================================================================
 # Configure NGINX for use with ReGaHss
 # ==============================================================================
-openssl req -new -x509 -nodes -keyout /etc/config/server.pem -out /etc/config/server.pem -days 3650 -subj "/C=DE/O=HomeMatic/OU=Hass.io/CN=$(hostname)"
+
+if [ -f /data/server.pem ]; then
+    cp -f /data/server.pem /etc/config/server.pem
+else
+    openssl req -new -x509 -nodes -keyout /etc/config/server.pem -out /etc/config/server.pem -days 3650 -subj "/C=DE/O=HomeMatic/OU=HomeAssistant/CN=$(hostname)"
+    cp -f /etc/config/server.pem /data/server.pem
+fi
diff --git a/homematic/rootfs/etc/cont-init.d/hm_ip.sh b/homematic/rootfs/etc/cont-init.d/hm_ip.sh
index 86e3b9b..8d5ac14 100755
--- a/homematic/rootfs/etc/cont-init.d/hm_ip.sh
+++ b/homematic/rootfs/etc/cont-init.d/hm_ip.sh
@@ -28,9 +28,15 @@ fi
 # Update Firmware
 for hmip_index in $(bashio::config 'hmip|keys'); do
     hmip_device=$(bashio::config "hmip[${hmip_index}].device")
+
+    # Skeep device path with id 
+    if echo "${hmip_device}" | grep "by-id"; then
+        bashio::log.warning "Skip firmware for ${hmip_device}"
+        continue
+    fi
+
     version_from="$(java -Xmx64m -jar /opt/HmIP/hmip-copro-update.jar -p "${hmip_device}" -v | grep "Application version =" | cut -d' ' -f5)"
     version_to="$(ls /firmware/HmIP-RFUSB/hmip_coprocessor_update-*.eq3 | sed 's/.*hmip_coprocessor_update-\(.*\)\.eq3/\1/' | tail -n1)"
-
     if [ "${version_from}" != "${version_to}" ]; then
         if java -Xmx64m -jar /opt/HmIP/hmip-copro-update.jar -p "${hmip_device}" -f "/firmware/HmIP-RFUSB/hmip_coprocessor_update-${version_to}.eq3"; then
             bashio::log.info "HmIP update to ${version_to} was successful"