diff --git a/src/proxy/proxyPython.pro b/src/proxy/proxyPython.pro
index 2c420b9..c8cc51f 100644
--- a/src/proxy/proxyPython.pro
+++ b/src/proxy/proxyPython.pro
@@ -8,9 +8,7 @@
 TARGET = proxyPython
 TEMPLATE = lib
 
-contains(QT_VERSION, "^5.*") {
-  QT += widgets
-}
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
 CONFIG += plugins
 CONFIG += dll