diff --git a/main.js b/main.js
index b4afecf5..102f090a 100644
--- a/main.js
+++ b/main.js
@@ -2,7 +2,7 @@
 // https://github.com/Azgaar/Fantasy-Map-Generator
 
 "use strict";
-const version = "1.5"; // generator version
+const version = "1.59"; // generator version
 document.title += " v" + version;
 
 // Switches to disable/enable logging features
diff --git a/modules/river-generator.js b/modules/river-generator.js
index 87c80688..0a6e5fd9 100644
--- a/modules/river-generator.js
+++ b/modules/river-generator.js
@@ -389,9 +389,9 @@ const remove = function(id) {
 }
 
 const getBasin = function(r) {
-    const parent = pack.rivers.find(river => river.i === r)?.parent;
-    if (!parent || r === parent) return r;
-    return getBasin(parent);
+  const parent = pack.rivers.find(river => river.i === r)?.parent;
+  if (!parent || r === parent) return r;
+  return getBasin(parent);
 }
 
 return {generate, resolveDepressions, addMeandering, getPath, specify, getName, getBasin, remove};
diff --git a/modules/save-and-load.js b/modules/save-and-load.js
index f93c2846..22720dd1 100644
--- a/modules/save-and-load.js
+++ b/modules/save-and-load.js
@@ -1099,6 +1099,23 @@ function parseLoadedData(data) {
         });
       }
 
+      if (version < 1.59) {
+        // v 1.6 changed rivers data
+        for (const river of pack.rivers) {
+          const el = document.getElementById("river"+river.i);
+          if (el) {
+            el.removeAttribute("data-width");
+            el.removeAttribute("data-increment");
+            river.widthFactor = +this.getAttribute("data-width");
+            river.discharge = pack.cells.fl[river.mouth] || 1;
+            river.width = rn(river.length / 100, 2);
+            river.sourceWidth = .1;
+          } else {
+            Rivers.remove(river.i);
+          }
+        }
+      }
+
     }()
 
     void function checkDataIntegrity() {