diff --git a/build.sh b/build.sh
index 1cecc7c..f3803d4 100644
--- a/build.sh
+++ b/build.sh
@@ -25,6 +25,7 @@ function build {
 
 function build_nvenc {
   git clone git://github.com/FFmpeg/nv-codec-headers.git $SRC/ffnvcodec
+  git checkout sdk/9.1
   cd $SRC/ffnvcodec
   make PREFIX=$BUILD install
   add_comp nvenc
@@ -39,7 +40,7 @@ function build_amf {
 function build_mfx {
   git clone https://github.com/lu-zero/mfx_dispatch.git $SRC/libmfx
   cd $SRC/libmfx
-  # git checkout c200d833e25a91e3e49d69890dac1ffa3486cbe9
+  git checkout c200d833e25a91e3e49d69890dac1ffa3486cbe9
   if [[ ! -f "configure" ]]; then
       autoreconf -fiv || exit 1
   fi