diff --git a/Util/WebPHelper.cs b/Util/WebPHelper.cs
index 4e0dcf8..f21920f 100644
--- a/Util/WebPHelper.cs
+++ b/Util/WebPHelper.cs
@@ -28,6 +28,8 @@ internal static class WebPHelper {
                 rgba = new byte[width * height * 4];
 
                 var decoderConfig = default(WebPDecoderConfig);
+                Native.WebPInitDecoderConfig(ref decoderConfig);
+                using var free = new OnDispose(() => Native.WebPFreeDecBuffer(ref decoderConfig.output));
                 decoderConfig.input = features;
                 decoderConfig.output.colorSpace = WebpCspMode.ModeRgba;
                 decoderConfig.output.isExternalMemory = 1;