diff --git a/README.md b/README.md
index 3498a2d6..0aa634b4 100644
--- a/README.md
+++ b/README.md
@@ -145,9 +145,9 @@ Or, for Ubuntu 12.04:
 Debian squeeze (6.0): the version of boost in squeeze is too old
 for ledger and unfortunately no backport is available at the moment.
 
-Debian 7 (wheezy), Debian 8 (jessie), Debian testing (stretch) and Debian
-unstable (sid) contain all components needed to build ledger.  You can
-install all required build dependencies using the following command:
+Debian 7 (wheezy), Debian 8 (jessie), Debian 9 (stretch), Debian testing
+and Debian unstable (sid) contain all components needed to build ledger.
+You can install all required build dependencies using the following command:
 
     $ sudo apt-get install build-essential cmake autopoint texinfo python-dev \
          zlib1g-dev libbz2-dev libgmp3-dev gettext libmpfr-dev \