diff --git a/.gitignore b/.gitignore
index 1266a13..79d8473 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,3 +35,22 @@ Thumbs.db
 
 # OS files
 .DS_Store
+
+# Secrets and credentials (defensive)
+.env
+.env.*
+!.env.example
+!.env.*.example
+*.pem
+*.key
+id_rsa
+id_rsa.*
+*.ppk
+*.p12
+*.pfx
+secrets.json
+secrets.yaml
+secrets.yml
+*_secret
+*_secrets
+credentials.json