diff --git a/README.md b/README.md
index 4daa5e282..7e2e434a9 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,11 @@ for its day to aid the virility of implementations. A vibrant and growing ecosys
 - **Sodium** library for curve ed25519.
 - **OpenSSL** library for HTTPS TLS / X.509.
 - **magic** library for MIME type recognition.
-- **zlib** or **lz4** or **snappy** (Optional) Compressions.
+
+##### Optional
+
+- **zlib** or **lz4** or **snappy** database compressions.
+- **GraphicsMagick** media thumbnails.
 
 ##### Build tools