diff --git a/CMakeLists.txt b/CMakeLists.txt
index b9d63ea..283d5b2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,7 +27,7 @@ include(ECMCoverageOption)
 set(MAILCOMMON_LIB_VERSION ${PIM_VERSION})
 set(AKONADIMIME_LIB_VERSION "5.8.0")
 set(MESSAGELIB_LIB_VERSION "5.8.0")
-set(QT_REQUIRED_VERSION "5.8.0")
+set(QT_REQUIRED_VERSION "5.9.0")
 set(KMIME_LIB_VERSION "5.8.0")
 set(KMAILTRANSPORT_LIB_VERSION "5.8.0")
 set(MAILIMPORTER_LIB_VERSION "5.8.0")