diff --git a/src/Svg.ts b/src/Svg.ts
index bc25ea0..f6aea47 100644
--- a/src/Svg.ts
+++ b/src/Svg.ts
@@ -2303,9 +2303,16 @@ export class SVGDrawing {
     calculateLogoDimensionsModuleApproach() {
         let logoHeight , logoWidth , logoAreaWidth , logoAreaHeight;
 
+        let logoScale = this.config.logoScale ;
         let logoMargin = this.config.logoMargin ;
         let rectangular = this.config.rectangular ;
 
+        if (logoScale <= 0 || logoScale >= 1) {
+            logoScale = 0.2 ;
+        }
+        if( logoMargin < 0 || logoMargin > 100 ){
+            logoMargin = 50 ;
+        }
         // Calibrating logo margin to avoid small logos
         // ( This will ensure at least 50% area of logo is covered by the actual logo)
         logoMargin = 0.5 * logoMargin
@@ -2364,8 +2371,8 @@ export class SVGDrawing {
 
         }
 
-        logoAreaHeight = ( this.config.logoScale / maxLogoScale ) * logoAreaHeight ;
-        logoAreaWidth = ( this.config.logoScale / maxLogoScale ) * logoAreaWidth ;
+        logoAreaHeight = ( logoScale / maxLogoScale ) * logoAreaHeight ;
+        logoAreaWidth = ( logoScale / maxLogoScale ) * logoAreaWidth ;
 
         this.calculatedLogoAreaHeight = logoAreaHeight ;
         this.calculatedLogoAreaWidth = logoAreaWidth ;