diff --git a/README.md b/README.md
index 0fc99f9..9cab7b2 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ First you'll need to [install Rust](https://www.rust-lang.org/tools/install) of
 Then make sure you have all the library build dependencies. The following apt command should pull in 
 everthing you need. If you don't already have build-essential installed, you'll need that too.
 
-    $ sudo apt install wget bc libelf-dev pkg-config libwayland-dev libxcb-composite0-dev libxkbcommon-dev libgbm-dev libpixman-1-dev libdrm-dev libdbus-1-dev
+    $ sudo apt install wget bc flex bison libelf-dev pkg-config libwayland-dev libxcb-composite0-dev libxkbcommon-dev libgbm-dev libpixman-1-dev libdrm-dev libdbus-1-dev
     $ cargo build --release
 
 If you like to watch text scroll when you build things you can add -vv to the build command: