diff --git a/README.md b/README.md
index 732275e..be14646 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,22 @@ This project was created in collaboration with [Sharon Brizinov](https://github.
 ```bash
 pip install -r requirements.txt
 ```
-3. Scan an org/user for secrets:
+
+3. Install TruffleHog (v3 or later — required for secret scanning):
+
+#### macOS (Homebrew):
+```bash
+brew install trufflehog
+```
+
+#### Linux / Other:
+Download the latest binary from the [Releases page](https://github.com/trufflesecurity/trufflehog/releases), or use:
+
+```bash
+go install github.com/trufflesecurity/trufflehog@latest
+```
+
+4. Scan an org/user for secrets:
 
 ```bash
 python force_push_scanner.py <org> --db-file /path/to/force_push_commits.sqlite3 --scan