diff --git a/README.md b/README.md
index 179d26f7..35beac6b 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,11 @@ If you are on a Mac, you may need to set the path to parity:
     $ git clone https://github.com/Paratii-Video/paratii-portal
     $ cd paratii-portal
     $ yarn
+    
+⚠️ If `yarn` is installing the wrong versions of any dependencies, run the following:
+
+    $ yarn cache clean
+    $ yarn
 
 ☝️ add the `--pure-lockfile` argument to `yarn` to ensure you install all dependencies exactly as specified in the current `yarn.lock` file.