diff --git a/README b/README
index cb64b74d..4aaf6a7c 100644
--- a/README
+++ b/README
@@ -38,6 +38,9 @@ functionality
 
     Cyrus-SASL
     libcacard      >= 0.1.2             (Smartcard support)
+    Opus           >= 1.0.0             (Opus audio encoding support)
+    LZ4                                 (LZ4 compression support)
+    GStreamer      >= 1.0.0
 
 Communication
 -------------