Lagrange [release]

Debian: Specify minimum dependency versions

diff --git a/debian/control b/debian/control
index 88ef8134..0afc50b1 100644
--- a/debian/control
+++ b/debian/control
@@ -2,7 +2,7 @@ Source: lagrange
 Section: net
 Priority: optional
 Maintainer: Jaakko Keränen (skyjake) 
-Build-Depends: cmake, debhelper (>=11~), libsdl2-dev, libssl-dev, libpcre3-dev, zlib1g-dev, libunistring-dev, libmpg123-dev
+Build-Depends: cmake (>=3.9), debhelper (>=11~), libsdl2-dev (>=2.0.4), libssl-dev (>=1.1.1), libpcre3-dev (>=8.38), zlib1g-dev, libunistring-dev, libmpg123-dev
 Standards-Version: 4.1.4
 Homepage: https://gmi.skyjake.fi/lagrange/