diff --git a/Dockerfile b/Dockerfile
index 22b2170..69e4d2e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,13 @@
 FROM python:slim
-  
+ 
+# flask and app
 RUN pip install flask flask-wtf
 COPY /pytubedl/pytubedl.py /pytubedl.py
 COPY /pytubedl/templates /templates
 EXPOSE 5000
 
+# youtube-dl
+RUN pip install youtube_dl
+
 CMD ["python", "pytubedl.py"]