diff --git a/README.md b/README.md
index 936352c..b9f6487 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,6 @@
 # passwordfile
 C++ library to read/write passwords from/to encrypted files.
+
+## Build instructions
+The passwordfile library depends on c++utilities and is built in the same way.
+It also depends on OpenSSL and zlib.