diff --git a/FROST-Server.Core/src/main/java/de/fraunhofer/iosb/ilt/frostserver/settings/Settings.java b/FROST-Server.Core/src/main/java/de/fraunhofer/iosb/ilt/frostserver/settings/Settings.java
index 21bd01132..29b91a073 100644
--- a/FROST-Server.Core/src/main/java/de/fraunhofer/iosb/ilt/frostserver/settings/Settings.java
+++ b/FROST-Server.Core/src/main/java/de/fraunhofer/iosb/ilt/frostserver/settings/Settings.java
@@ -44,7 +44,7 @@ private static Properties addEnvironment(Properties wrapped) {
         Properties wrapper = new Properties(wrapped);
 
         for (Map.Entry<String, String> entry : environment.entrySet()) {
-            String key = entry.getKey().replace("_", ".");
+            String key = entry.getKey().replace('_', '.');
             LOGGER.debug("Added environment variable: {}", key);
             wrapper.setProperty(key, entry.getValue());
         }
@@ -141,7 +141,7 @@ public void setLogSensitiveData(boolean logSensitiveData) {
      * @return prefix + propertyName
      */
     private String getPropertyKey(String propertyName) {
-        return prefix + propertyName.replace("_", ".");
+        return prefix + propertyName.replace('_', '.');
     }
 
     /**
diff --git a/FROST-Server.Core/src/main/java/de/fraunhofer/iosb/ilt/frostserver/settings/SettingsMigrator.java b/FROST-Server.Core/src/main/java/de/fraunhofer/iosb/ilt/frostserver/settings/SettingsMigrator.java
index 35b9de3b0..fb405dc52 100644
--- a/FROST-Server.Core/src/main/java/de/fraunhofer/iosb/ilt/frostserver/settings/SettingsMigrator.java
+++ b/FROST-Server.Core/src/main/java/de/fraunhofer/iosb/ilt/frostserver/settings/SettingsMigrator.java
@@ -39,6 +39,7 @@ public class SettingsMigrator {
 
     private final Map<String, Map<String, ReplaceList>> valueChanges = new HashMap<>();
     private final Map<String, String> keyChanges = new HashMap<>();
+    private final Map<String, ValueChecker> valueCheckers = new HashMap<>();
 
     private Map<String, ReplaceList> getReplaceValue(String key) {
         return valueChanges.computeIfAbsent(key, t -> new TreeMap<>());
@@ -77,6 +78,18 @@ public void migrateOldSettings(Properties properties) {
         for (Map.Entry<String, Map<String, ReplaceList>> change : valueChanges.entrySet()) {
             migrateOldSettings(properties, change.getKey(), change.getValue());
         }
+        for (Map.Entry<String, ValueChecker> checkEntry : valueCheckers.entrySet()) {
+            String key = checkEntry.getKey();
+            ValueChecker checker = checkEntry.getValue();
+            String valueOld = properties.getProperty(key);
+            if (valueOld != null) {
+                String valueNew = checker.getNewValue(valueOld);
+                if (!valueOld.equals(valueNew)) {
+                    LOGGER.warn("Converting setting with key: {} from old value: {} to new value: {}", key, valueOld, valueNew);
+                    properties.setProperty(key, valueNew);
+                }
+            }
+        }
     }
 
     private void migrateOldSettings(Properties properties, String key, Map<String, ReplaceList> replaces) {
@@ -98,7 +111,7 @@ private void migrateOldSettings(Properties properties, String key, Map<String, R
     }
 
     private void migrateOldSettings(Properties properties, String oldKey, String newKey) {
-        Object oldValue = properties.get(oldKey);
+        String oldValue = properties.getProperty(oldKey);
         if (oldValue != null) {
             LOGGER.warn("Converting setting with old key: {} to new key: {} with value: {}", oldKey, newKey, oldValue);
             properties.remove(oldKey);
@@ -135,4 +148,8 @@ public ReplaceList copy() {
 
     }
 
+    private static interface ValueChecker {
+
+        public String getNewValue(String oldValue);
+    }
 }
diff --git a/FROST-Server.MQTT.Moquette/src/main/java/de/fraunhofer/iosb/ilt/frostserver/mqtt/moquette/ConfigWrapper.java b/FROST-Server.MQTT.Moquette/src/main/java/de/fraunhofer/iosb/ilt/frostserver/mqtt/moquette/ConfigWrapper.java
index 7e0d7efdd..3e7380ca4 100644
--- a/FROST-Server.MQTT.Moquette/src/main/java/de/fraunhofer/iosb/ilt/frostserver/mqtt/moquette/ConfigWrapper.java
+++ b/FROST-Server.MQTT.Moquette/src/main/java/de/fraunhofer/iosb/ilt/frostserver/mqtt/moquette/ConfigWrapper.java
@@ -36,27 +36,27 @@ public ConfigWrapper(Settings wrappedSettings) {
 
     @Override
     public void setProperty(String name, String value) {
-        wrappedSettings.set(name, value);
+        wrappedSettings.set(name.replace('_', '.'), value);
     }
 
     @Override
     public String getProperty(String name) {
-        return wrappedSettings.get(name, (String) null);
+        return wrappedSettings.get(name.replace('_', '.'), (String) null);
     }
 
     @Override
     public String getProperty(String name, String defaultValue) {
-        return wrappedSettings.get(name, defaultValue);
+        return wrappedSettings.get(name.replace('_', '.'), defaultValue);
     }
 
     @Override
     public int intProp(String propertyName, int defaultValue) {
-        return wrappedSettings.getInt(propertyName, defaultValue);
+        return wrappedSettings.getInt(propertyName.replace('_', '.'), defaultValue);
     }
 
     @Override
     public boolean boolProp(String propertyName, boolean defaultValue) {
-        return wrappedSettings.getBoolean(propertyName, defaultValue);
+        return wrappedSettings.getBoolean(propertyName.replace('_', '.'), defaultValue);
     }
 
     @Override