diff --git a/docker/Dockerfile b/docker/Dockerfile
index 3c4d7f0e..f33ba9ba 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -20,6 +20,7 @@ RUN apk update --no-cache && \
     tar -xf ffmpeg.tar.xz -C ffmpeg_out/ --strip-components 1 && \
     mv ffmpeg_out/bin/* /usr/bin/ && \
     rm -rf ffmpeg.tar.xz ffmpeg_out/ && \
+    ls -lh /usr/bin | grep ff && \
     ffmpeg -version && \
     ffprobe -version && \
     apk del \