diff --git a/main.js b/main.js
index c2c4301a..75eba699 100644
--- a/main.js
+++ b/main.js
@@ -2,7 +2,7 @@
 // https://github.com/Azgaar/Fantasy-Map-Generator
 
 "use strict";
-const version = "1.651"; // generator version1
+const version = "1.652"; // generator version1
 document.title += " v" + version;
 
 // Switches to disable/enable logging features
diff --git a/modules/heightmap-generator.js b/modules/heightmap-generator.js
index 7fc70a6c..9d12a802 100644
--- a/modules/heightmap-generator.js
+++ b/modules/heightmap-generator.js
@@ -30,8 +30,8 @@ window.HeightmapGenerator = (function () {
     if (a1 === "Range") return addRange(a2, a3, a4, a5);
     if (a1 === "Trough") return addTrough(a2, a3, a4, a5);
     if (a1 === "Strait") return addStrait(a2, a3);
-    if (a1 === "Add") return modify(a3, a2, 1);
-    if (a1 === "Multiply") return modify(a3, 0, a2);
+    if (a1 === "Add") return modify(a3, +a2, 1);
+    if (a1 === "Multiply") return modify(a3, 0, +a2);
     if (a1 === "Smooth") return smooth(a2);
   }