diff --git a/zwave/CHANGELOG.md b/zwave/CHANGELOG.md
index 145b95c..d2f1cd7 100644
--- a/zwave/CHANGELOG.md
+++ b/zwave/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.4.2
+
+- Improve error message when using documented network_key
+
 ## 0.4.1
 
 - Fix optional instance parameter
diff --git a/zwave/config.json b/zwave/config.json
index 58879fa..c1a0206 100644
--- a/zwave/config.json
+++ b/zwave/config.json
@@ -1,6 +1,6 @@
 {
   "name": "OpenZWave",
-  "version": "0.4.1",
+  "version": "0.4.2",
   "slug": "zwave",
   "description": "Control a ZWave network with Home Assistant",
   "arch": ["amd64", "i386", "armhf", "armv7", "aarch64"],
diff --git a/zwave/rootfs/etc/cont-init.d/network_key.sh b/zwave/rootfs/etc/cont-init.d/network_key.sh
index 7a91ab1..8e945b3 100644
--- a/zwave/rootfs/etc/cont-init.d/network_key.sh
+++ b/zwave/rootfs/etc/cont-init.d/network_key.sh
@@ -5,5 +5,19 @@
 readonly DOCS_EXAMPLE_KEY="0x2e, 0xcc, 0xab, 0x1c, 0xa3, 0x7f, 0x0e, 0xb5, 0x70, 0x71, 0x2d, 0x98, 0x25, 0x43, 0xee, 0x0c"
 
 if [[ "${DOCS_EXAMPLE_KEY}" == "$(bashio::config 'network_key')" ]]; then
-    bashio::exit.nok "Network key from the example documentation used. Please create an unique one!"
+    bashio::log.fatal
+    bashio::log.fatal 'The add-on detected that the Z-Wave network key used'
+    bashio::log.fatal 'is from the documented example.'
+    bashio::log.fatal
+    bashio::log.fatal 'Using this key is insecure, because it is publicly'
+    bashio::log.fatal 'listed in the documentation.'
+    bashio::log.fatal
+    bashio::log.fatal 'Please check the add-on documentation on how to'
+    bashio::log.fatal 'create your own, secret, "network_key" and replace'
+    bashio::log.fatal 'the one you have configured.'
+    bashio::log.fatal
+    bashio::log.fatal 'Click on the "Documentation" tab in the OpenZWave'
+    bashio::log.fatal 'add-on panel for more information.'
+    bashio::log.fatal
+    bashio::exit.nok
 fi