diff --git a/src/loaders/lottie/tvgLottieBuilder.cpp b/src/loaders/lottie/tvgLottieBuilder.cpp
index f193d71f..88523d9f 100644
--- a/src/loaders/lottie/tvgLottieBuilder.cpp
+++ b/src/loaders/lottie/tvgLottieBuilder.cpp
@@ -1338,7 +1338,8 @@ void LottieBuilder::updateEffect(LottieLayer* layer, float frameNo)
             case LottieEffect::DropShadow: {
                 auto effect = static_cast<LottieFxDropShadow*>(*ef);
                 auto color = effect->color(frameNo);
-                layer->scene->push(SceneEffect::DropShadow, color.rgb[0], color.rgb[1], color.rgb[2], (int)effect->opacity(frameNo), effect->angle(frameNo), effect->distance(frameNo), effect->blurness(frameNo) * BLUR_TO_SIGMA, QUALITY);
+                //seems the opacity range in dropshadow is 0 ~ 256
+                layer->scene->push(SceneEffect::DropShadow, color.rgb[0], color.rgb[1], color.rgb[2], std::min(255, (int)effect->opacity(frameNo)), effect->angle(frameNo), effect->distance(frameNo), effect->blurness(frameNo) * BLUR_TO_SIGMA, QUALITY);
                 break;
             }
             case LottieEffect::GaussianBlur: {