diff --git a/docs/cornell.png b/docs/cornell.png
index 9eb79b9..0df2316 100644
Binary files a/docs/cornell.png and b/docs/cornell.png differ
diff --git a/docs/cornell_smoke.png b/docs/cornell_smoke.png
index d4e202c..2078917 100644
Binary files a/docs/cornell_smoke.png and b/docs/cornell_smoke.png differ
diff --git a/docs/simple.png b/docs/simple.png
index 85b2312..16e9e7c 100644
Binary files a/docs/simple.png and b/docs/simple.png differ
diff --git a/docs/squares.png b/docs/squares.png
index f66d4d1..890dcb4 100644
Binary files a/docs/squares.png and b/docs/squares.png differ
diff --git a/src/main/java/eu/jonahbauer/raytracing/render/ImageFormat.java b/src/main/java/eu/jonahbauer/raytracing/render/ImageFormat.java
index 6a92e53..c486dbb 100644
--- a/src/main/java/eu/jonahbauer/raytracing/render/ImageFormat.java
+++ b/src/main/java/eu/jonahbauer/raytracing/render/ImageFormat.java
@@ -41,6 +41,7 @@ public enum ImageFormat {
         private static final int IHDR_TYPE = 0x49484452;
         private static final int IDAT_TYPE = 0x49444154;
         private static final int IEND_TYPE = 0x49454E44;
+        private static final int IEND_CRC = 0xAE426082;
 
         @Override
         public void write(@NotNull Canvas image, @NotNull OutputStream out) throws IOException {
@@ -101,7 +102,7 @@ public enum ImageFormat {
         private void writeIEND(@NotNull Canvas image, @NotNull DataOutputStream data) throws IOException {
             data.writeInt(0);
             data.writeInt(IEND_TYPE);
-            data.writeInt(0);
+            data.writeInt(IEND_CRC);
         }
 
         private static class NoCloseDataOutputStream extends DataOutputStream {