diff --git a/config_webrx.py b/config_webrx.py
index 1ce7c06..6262210 100644
--- a/config_webrx.py
+++ b/config_webrx.py
@@ -33,7 +33,7 @@ config_webrx: configuration options for OpenWebRX
 """
 
 # configuration version. please only modify if you're able to perform the associated migration steps.
-version = 6
+version = 7
 
 # NOTE: you can find additional information about configuring OpenWebRX in the Wiki:
 # https://github.com/jketterl/openwebrx/wiki/Configuration-guide
@@ -258,16 +258,18 @@ Note: if you experience audio underruns while CPU usage is 100%, you can:
 #waterfall_colors = [0x0000FF, 0x00FF00, 0xFF0000]
 
 ### Waterfall calibration
-#waterfall_levels = {"min": -88, "max": -20}  # in dB
-waterfall_auto_level_margin = {"min": 3, "max": 10, "min_range": 50}
+#waterfall_auto_levels = {"min": -88, "max": -20}  # in dB
+
+waterfall_auto_levels = {"min": 3, "max": 10}
+waterfall_auto_min_range = 50
 
 # Note: When the auto waterfall level button is clicked, the following happens:
-#   [waterfall_levels.min] = [current_min_power_level] - [waterfall_auto_level_margin["min"]]
-#   [waterfall_levels.max] = [current_max_power_level] + [waterfall_auto_level_margin["max"]]
+#   [waterfall_levels.min] = [current_min_power_level] - [waterfall_auto_levels["min"]]
+#   [waterfall_levels.max] = [current_max_power_level] + [waterfall_auto_levels["max"]]
 #
-#   ___|________________________________________|____________________________________|________________________________________|___> signal power
-#        \_waterfall_auto_level_margin["min"]_/ |__ current_min_power_level          | \_waterfall_auto_level_margin["max"]_/
-#                                                          current_max_power_level __|
+#   ___|__________________________________|____________________________________|__________________________________|___> signal power
+#        \_waterfall_auto_levels["min"]_/ |__ current_min_power_level          | \_waterfall_auto_levels["max"]_/
+#                                                    current_max_power_level __|
 
 # This setting allows you to modify the precision of the frequency displays in OpenWebRX.
 # Set this to exponent of 10 to select the most precise digit in Hz you'd like to see
diff --git a/htdocs/openwebrx.js b/htdocs/openwebrx.js
index 83616a6..07bcf25 100644
--- a/htdocs/openwebrx.js
+++ b/htdocs/openwebrx.js
@@ -72,7 +72,8 @@ var waterfall_max_level;
 var waterfall_min_level_default;
 var waterfall_max_level_default;
 var waterfall_colors = buildWaterfallColors(['#000', '#FFF']);
-var waterfall_auto_level_margin;
+var waterfall_auto_levels;
+var waterfall_auto_min_range;
 
 function buildWaterfallColors(input) {
     return chroma.scale(input).colors(256, 'rgb')
@@ -110,9 +111,9 @@ function waterfallColorsDefault() {
 }
 
 function waterfallColorsAuto(levels) {
-    var min_level = levels.min - waterfall_auto_level_margin.min;
-    var max_level = levels.max + waterfall_auto_level_margin.max;
-    max_level = Math.max(min_level + (waterfall_auto_level_margin.min_range || 0), max_level);
+    var min_level = levels.min - waterfall_auto_levels.min;
+    var max_level = levels.max + waterfall_auto_levels.max;
+    max_level = Math.max(min_level + (waterfall_auto_min_range || 0), max_level);
     waterfall_min_level = min_level;
     waterfall_max_level = max_level;
     updateWaterfallSliders();
@@ -721,8 +722,10 @@ function on_ws_recv(evt) {
                             waterfall_min_level_default = config['waterfall_levels']['min'];
                             waterfall_max_level_default = config['waterfall_levels']['max'];
                         }
-                        if ('waterfall_auto_level_margin' in config)
-                            waterfall_auto_level_margin = config['waterfall_auto_level_margin'];
+                        if ('waterfall_auto_levels' in config)
+                            waterfall_auto_levels = config['waterfall_auto_levels'];
+                        if ('waterfall_auto_min_range' in config)
+                            waterfall_auto_min_range = config['waterfall_auto_min_range'];
                         waterfallColorsDefault();
 
                         var initial_demodulator_params = {};
diff --git a/owrx/config/defaults.py b/owrx/config/defaults.py
index 2ea3286..ef03de0 100644
--- a/owrx/config/defaults.py
+++ b/owrx/config/defaults.py
@@ -2,7 +2,7 @@ from owrx.property import PropertyLayer
 
 
 defaultConfig = PropertyLayer(
-    version=6,
+    version=7,
     max_clients=20,
     receiver_name="[Callsign]",
     receiver_location="Budapest, Hungary",
@@ -142,7 +142,8 @@ defaultConfig = PropertyLayer(
     ),
     waterfall_scheme="GoogleTurboWaterfall",
     waterfall_levels=PropertyLayer(min=-88, max=-20),
-    waterfall_auto_level_margin=PropertyLayer(min=3, max=10, min_range=50),
+    waterfall_auto_levels=PropertyLayer(min=3, max=10),
+    waterfall_auto_min_range=50,
     tuning_precision=2,
     squelch_auto_margin=10,
     nmux_memory=50,
diff --git a/owrx/config/migration.py b/owrx/config/migration.py
index 3ddccbd..ec0068b 100644
--- a/owrx/config/migration.py
+++ b/owrx/config/migration.py
@@ -1,4 +1,5 @@
 from abc import ABC, abstractmethod
+from owrx.property import PropertyLayer
 
 import logging
 
@@ -98,14 +99,27 @@ class ConfigMigratorVersion5(ConfigMigrator):
         config["version"] = 6
 
 
+class ConfigMigratorVersion6(ConfigMigrator):
+    def migrate(self, config):
+        if "waterfall_auto_level_margin" in config:
+            walm_config = config["waterfall_auto_level_margin"]
+            if "min_range" in walm_config:
+                config["waterfall_auto_min_range"] = walm_config["min_range"]
+            wal = {k: v for k, v in walm_config.items() if k in ["min", "max"]}
+            config["waterfall_auto_levels"] = PropertyLayer(**wal)
+            del config["waterfall_auto_level_margin"]
+        config["version"] = 7
+
+
 class Migrator(object):
-    currentVersion = 6
+    currentVersion = 7
     migrators = {
         1: ConfigMigratorVersion1(),
         2: ConfigMigratorVersion2(),
         3: ConfigMigratorVersion3(),
         4: ConfigMigratorVersion4(),
         5: ConfigMigratorVersion5(),
+        6: ConfigMigratorVersion6(),
     }
 
     @staticmethod
diff --git a/owrx/connection.py b/owrx/connection.py
index a3c542f..07cfcda 100644
--- a/owrx/connection.py
+++ b/owrx/connection.py
@@ -127,7 +127,8 @@ class OpenWebRxReceiverClient(OpenWebRxClient, SdrSourceEventClient):
     global_config_keys = [
         "waterfall_scheme",
         "waterfall_colors",
-        "waterfall_auto_level_margin",
+        "waterfall_auto_levels",
+        "waterfall_auto_min_range",
         "fft_size",
         "audio_compression",
         "fft_compression",