diff --git a/app/README.md b/app/README.md
index 37a01aece..78fc8d89b 100644
--- a/app/README.md
+++ b/app/README.md
@@ -12,6 +12,11 @@ Install `nodejs v18`
 yarn
 ```
 
+In `/common`, also run:
+```bash
+yarn
+```
+
 #### Add circuit build
 
 Go to the `circuit` folder of the monorepo and build the circuit.