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diff --git a/README.md b/README.md
index 701d020e0a..8f50de7e65 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,8 @@ Essential dependencies (incomplete list):
 - FFmpeg libraries (libavutil libavcodec libavformat libswscale libavfilter
   and either libswresample or libavresample)
   At least FFmpeg 2.1.4 or Libav 10 is required.
+- zlib
+- iconv (normally provided by the system libc)
 - libass
 - Lua (optional, required for the OSC pseudo-GUI and youtube-dl integration)
 - libjpeg (optional, used for screenshots only)