diff --git a/src/lib/ImageEffectRenderer.ts b/src/lib/ImageEffectRenderer.ts
index 65515d4..e5eb2c2 100644
--- a/src/lib/ImageEffectRenderer.ts
+++ b/src/lib/ImageEffectRenderer.ts
@@ -21,7 +21,7 @@ export default class ImageEffectRenderer {
     public static defaultOptions: ImageEffectRendererOptions = {
         loop: false,
         autoResize: true,
-        pixelRatio: window.devicePixelRatio,
+        pixelRatio: typeof window !== 'undefined' ? window.devicePixelRatio : 1,
         useSharedContext: true,
         asyncCompile: true,
     };
diff --git a/src/lib/RendererBuffer.ts b/src/lib/RendererBuffer.ts
index bf2e22c..90b2d7e 100644
--- a/src/lib/RendererBuffer.ts
+++ b/src/lib/RendererBuffer.ts
@@ -11,7 +11,7 @@ export class RendererBuffer extends Renderer {
         ...Renderer.defaultImageOptions,
         useMipmap: false,
         useCache: false,
-        type: WebGLRenderingContext.UNSIGNED_BYTE,
+        type: 5121, // WebGLRenderingContext.UNSIGNED_BYTE,
     };
 
     public options: BufferOptions;