diff --git a/build.sh b/build.sh
index c166e3e..100381a 100644
--- a/build.sh
+++ b/build.sh
@@ -44,6 +44,7 @@ make distclean
 	--enable-openssl \
 	--enable-libmp3lame \
 	--enable-pic \
+  --enable-libass \
 	--enable-nonfree 
 
 #	--disable-debug \
diff --git a/deps/20_libass/build.sh b/deps/20_libass/build.sh
new file mode 100644
index 0000000..1dcded4
--- /dev/null
+++ b/deps/20_libass/build.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+export PKG_CONFIG_PATH=/app/ffmpeg/install/lib/pkgconfig:/app/ffmpeg/install/lib64/pkgconfig/
+curDir="$PWD"
+
+pkg=libass
+if ! [[ -d "$pkg" ]]
+then
+  git clone https://github.com/libass/libass.git
+fi
+cd "$pkg"
+
+if ! [[ -f configure ]] && [[ -f autogen.sh ]]
+then
+  bash autogen.sh
+elif ! [[ -f configure ]]
+then
+  echo "NO WAY TO CONFIGURE?, CMAKE?"
+  exit 1
+fi
+
+make clean
+make distclean
+./configure \
+    --prefix="/app/ffmpeg/install/"
+
+make -j8 
+if make
+then
+  make install
+  cd "$curDir"
+  rm -rf "$pkg"
+else
+  cd "$curDir"
+  echo "BUILD FAILED"
+fi
+
+echo "Done"
+