diff --git a/README.md b/README.md
index 9583fc6..db32093 100644
--- a/README.md
+++ b/README.md
@@ -50,14 +50,20 @@ Features
 Requirements
 ------------
 
-There are no runtime requirements, it is possible to build binary that
-requires only libc.
+There are no additional libraries required, it is possible to build
+binary that requires only libc.
 
 Build requirements:
 
 * Chicken Scheme 5
 * make (tested with GNU make)
 
+Runtime requirements:
+
+* POSIX.1 shell (for Fio account statements downloader)
+* git (for members directory queries)
+* POSIX.1 mail utility configured to send emails from local system
+
 Building
 --------