diff --git a/166_Ascii_Image/ascii-image-canvas/sketch.js b/166_Ascii_Image/ascii-image-canvas/sketch.js
index 25b1992..a641de3 100644
--- a/166_Ascii_Image/ascii-image-canvas/sketch.js
+++ b/166_Ascii_Image/ascii-image-canvas/sketch.js
@@ -40,7 +40,7 @@ function draw() {
       //square(i * w, j * h, w);
       
       const len = density.length;
-      const charIndex = floor(map(avg,0,255,len,0));
+      const charIndex = floor(map(avg,0,256,len,0));
       
       
       
diff --git a/166_Ascii_Image/ascii-image-dom/sketch.js b/166_Ascii_Image/ascii-image-dom/sketch.js
index d1fb9b8..74c8a91 100644
--- a/166_Ascii_Image/ascii-image-dom/sketch.js
+++ b/166_Ascii_Image/ascii-image-dom/sketch.js
@@ -32,7 +32,7 @@ function setup() {
       const avg = (r + g + b) / 3;
 
       const len = density.length;
-      const charIndex = floor(map(avg, 0, 255, len, 0));
+      const charIndex = floor(map(avg, 0, 256, len, 0));
 
       const c = density.charAt(charIndex);
       if (c == " ") row += " ";
diff --git a/166_Ascii_Image/ascii-video/sketch.js b/166_Ascii_Image/ascii-video/sketch.js
index aae40fa..fcc6e2d 100644
--- a/166_Ascii_Image/ascii-video/sketch.js
+++ b/166_Ascii_Image/ascii-video/sketch.js
@@ -33,7 +33,7 @@ function draw() {
       const b = video.pixels[pixelIndex + 2];
       const avg = (r + g + b) / 3;
       const len = density.length;
-      const charIndex = floor(map(avg, 0, 255, 0, len));
+      const charIndex = floor(map(avg, 0, 256, 0, len));
       const c = density.charAt(charIndex);
       if (c == " ") asciiImage += " ";
       else asciiImage += c;