diff --git a/package.json b/package.json
index 7156d5a4..0fc7cd86 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "grid-apps",
-    "version": "3.0.12D",
+    "version": "3.0.13D",
     "description": "grid.space 3d slice & modeling tools",
     "author": "Stewart Allen <sa@grid.space>",
     "license": "MIT",
diff --git a/src/geo/polygons.js b/src/geo/polygons.js
index b5094524..f2a09485 100644
--- a/src/geo/polygons.js
+++ b/src/geo/polygons.js
@@ -520,8 +520,6 @@
             fill = numOrDefault(opts.fill, ClipperLib.PolyFillType.pftNonZero),
             join = numOrDefault(opts.join, ClipperLib.JoinType.jtMiter),
             type = numOrDefault(opts.type, ClipperLib.EndType.etClosedPolygon),
-            coff = new ClipperLib.ClipperOffset(opts.miter, opts.arc),
-            ctre = new ClipperLib.PolyTree(),
             // if dist is array with values, shift out next offset
             offs = Array.isArray(dist) ? (dist.length > 1 ? dist.shift() : dist[0]) : dist,
             mina = numOrDefault(opts.minArea, 0.1),
@@ -530,6 +528,9 @@
         if (opts.wasm && geo.wasm) {
             polys = geo.wasm.js.offset(polys, offs, zed);
         } else {
+            let coff = new ClipperLib.ClipperOffset(opts.miter, opts.arc),
+                ctre = new ClipperLib.PolyTree();
+
             // setup offset
             for (let poly of polys) {
                 // convert to clipper format
diff --git a/src/kiri.js b/src/kiri.js
index 703a58bf..105f7a3b 100644
--- a/src/kiri.js
+++ b/src/kiri.js
@@ -6,7 +6,7 @@
 
     if (!self.kiri) {
         self.kiri = {
-            beta: 3012,
+            beta: 3013,
             driver: {}, // driver modules
             loader: []  // module loading: array of functions
         };
diff --git a/src/license.js b/src/license.js
index 0038bcc8..a257f335 100644
--- a/src/license.js
+++ b/src/license.js
@@ -3,7 +3,7 @@
     let terms = {
         COPYRIGHT: "Copyright (C) Stewart Allen <sa@grid.space> - All Rights Reserved",
         LICENSE: "See the license.md file included with the source distribution",
-        VERSION: "3.0.D12"
+        VERSION: "3.0.D13"
     };
 
     if (typeof(module) === 'object') {