diff --git a/README.md b/README.md
index 5dd531160..e30659734 100644
--- a/README.md
+++ b/README.md
@@ -154,7 +154,7 @@ $ ./litex_setup.py update
 
 3. Install a RISC-V toolchain (Only if you want to test/create a SoC with a CPU):
 ```sh
-$ pip3 install meson
+$ pip3 install meson ninja
 $ ./litex_setup.py gcc
 ```