diff --git a/src/constants.js b/src/constants.js
index 3e117b5..e08c4ca 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -1 +1,2 @@
 export const PRECISION = 0.01;
+export const VERSION = '0.0.18';
diff --git a/src/sliceActions/helpers/GCode.js b/src/sliceActions/helpers/GCode.js
index 4683c10..cf2fbb4 100644
--- a/src/sliceActions/helpers/GCode.js
+++ b/src/sliceActions/helpers/GCode.js
@@ -1,5 +1,5 @@
 import { Vector2 } from 'three/src/math/Vector2.js';
-import { PRECISION } from '../../constants.js';
+import { PRECISION, VERSION } from '../../constants.js';
 
 export const MOVE = 'G';
 export const M_COMMAND = 'M';
@@ -14,7 +14,7 @@ export default class {
   constructor(nozzleToFilamentRatio) {
     this._nozzleToFilamentRatio = nozzleToFilamentRatio;
 
-    this._gcode = [];
+    this._gcode = [`; Generated with Doodle3D Slicer V${VERSION}`];
     this._currentValues = {};
     this._nozzlePosition = new Vector2(0, 0);
     this._extruder = 0.0;