diff --git a/Debian-installation-guide.md b/Debian-installation-guide.md
index 46842aa..1a988c1 100644
--- a/Debian-installation-guide.md
+++ b/Debian-installation-guide.md
@@ -31,7 +31,7 @@ Note: libxcb-emwh-dev is not included as a dependency in the install script, but
 Finally, we can install sway itself.
 
 ````
-sudo apt-get install libpcre3 libpcre3-dev libcairo2 libcairo2-dev libpango1.0-0 libpango1.0-dev asciidoc libjson-c2 libjson-c-dev
+sudo apt-get install libpcre3 libpcre3-dev libcairo2 libcairo2-dev libpango1.0-0 libpango1.0-dev asciidoc libjson-c2 libjson-c-dev libcap-dev
 git clone https://github.com/SirCmpwn/sway.git
 cd sway/
 mkdir build