diff --git a/INSTALL b/INSTALL
index 2b41b3e..0bc464b 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,7 +1,7 @@
 ** Dependencies for compilation (on Debian) **
 
-libqt4-dev
-libqt4-sql-sqlite
+libqt4-dev (>= 4.7)
+libqt4-sql-sqlite (>= 4.7)
 libofx4
 g++
 make
diff --git a/Makefile b/Makefile
index aae674a..0b0f810 100644
--- a/Makefile
+++ b/Makefile
@@ -34,9 +34,9 @@ LDFLAGS+=lib/libkdchart.a
 
 all: mojito lib/libkdchart.a kc
 
-clean_all: clean clean_libkdchart
+clean: clean_kc clean_libkdchart
 
-clean: 
+clean_kc: 
 	find src -type f -name '*.o' -delete
 	find src -type f -name '*~' -delete
 	find src -type f -name '*.moc' -delete
diff --git a/README b/README
index 545878c..ffc7dd6 100644
--- a/README
+++ b/README
@@ -2,7 +2,7 @@ KissCount is personnal account software delivered under GPL v3 licence terms.
 
 Current version is 0.3
 
-Qt4, libqt4-sql-sqlite and libofx are needed
+Qt4 (>= 4.7), libqt4-sql-sqlite and libofx are needed
 
 If you use web view, edit database.php and set $BDD_FILE, it's higly recommanded to use an SSL certificate.
 
diff --git a/README.fr b/README.fr
index caa88e6..3589b79 100644
--- a/README.fr
+++ b/README.fr
@@ -2,7 +2,7 @@ KissCount est un logiciel de gestion de comptes personnels délivré sous licenc
 
 La version actuelle est 0.3
 
-Qt4, libqt4-sql-sqlite et libofx sont nécessaires
+Qt4 (>= 4.7), libqt4-sql-sqlite et libofx sont nécessaires
 
 Si vous utilisez la version web pour visualiser vos comptes, éditez d'abord le fichier database.php en positionnant correctement la variable $BDD_FILE, il est fortement recommandé d'utiliser un certificat SSL.
 
diff --git a/debian/control b/debian/control
index f749a7c..dbd0037 100644
--- a/debian/control
+++ b/debian/control
@@ -2,7 +2,7 @@ Source: kisscount
 Section: misc
 Priority: extra
 Maintainer: Grégory Soutadé <soutade@gmail.com>
-Build-Depends: debhelper (>= 7.0.50~), libofx-dev, libqt4-dev
+Build-Depends: debhelper (>= 7.0.50~), libofx-dev, libqt4-dev (>= 4.7)
 Standards-Version: 3.9.1
 Homepage: http://indefero.soutade.fr/p/kisscount/
 Vcs-Git: git://soutade.fr/kisscount.git