diff --git a/README.md b/README.md
index aac28d9..424ad9b 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ sudo apt install pkg-config clang libtool-bin make ruby time
sudo apt install libffi-dev libbsd-dev libevent-dev
# install demo dependencies
-sudo apt install libsdl2-dev libxkbcommon-dev libfreetype-dev
+sudo apt install glew libfreetype-dev libsdl2-dev libxkbcommon-dev
# use clang
export CC=clang