diff --git a/sci-calculators/qalculate/qalculate_qt-5.0.0.recipe b/sci-calculators/qalculate/qalculate_qt-5.5.1.recipe
similarity index 78%
rename from sci-calculators/qalculate/qalculate_qt-5.0.0.recipe
rename to sci-calculators/qalculate/qalculate_qt-5.5.1.recipe
index a1cd1c41f..4c781eb93 100644
--- a/sci-calculators/qalculate/qalculate_qt-5.0.0.recipe
+++ b/sci-calculators/qalculate/qalculate_qt-5.5.1.recipe
@@ -12,7 +12,7 @@ COPYRIGHT="2003-2006, 2023 Hanna Knutsson"
 LICENSE="GNU GPL v2"
 REVISION="1"
 SOURCE_URI="https://github.com/Qalculate/qalculate-qt/releases/download/v$portVersion/qalculate-qt-$portVersion.tar.gz"
-CHECKSUM_SHA256="4143033faba2851de992dc7da96a81362b11a447256b0df7cbc0fbfabbd34408"
+CHECKSUM_SHA256="2d01841f7a7703417c6c251bcd6bcda81db0bf7d5c32827b7a8b396d572af843"
 SOURCE_DIR="qalculate-qt-$portVersion"
 ADDITIONAL_FILES="qalculate_qt.rdef.in"
 
@@ -27,27 +27,27 @@ REQUIRES="
 	haiku$secondaryArchSuffix
 	lib:libGL$secondaryArchSuffix
 	lib:libqalculate$secondaryArchSuffix
-	lib:libQt5Core$secondaryArchSuffix
-	lib:libQt5Gui$secondaryArchSuffix
-	lib:libQt5Network$secondaryArchSuffix
-	lib:libQt5Widgets$secondaryArchSuffix
+	lib:libQt6Core$secondaryArchSuffix
+	lib:libQt6Gui$secondaryArchSuffix
+	lib:libQt6Network$secondaryArchSuffix
+	lib:libQt6Widgets$secondaryArchSuffix
 	"
 
 BUILD_REQUIRES="
 	haiku${secondaryArchSuffix}_devel
+	qt6_tools${secondaryArchSuffix}_devel
 	devel:libGL$secondaryArchSuffix
 	devel:libqalculate$secondaryArchSuffix
-	devel:libQt5Core$secondaryArchSuffix
-	devel:libQt5Gui$secondaryArchSuffix
-	devel:libQt5Network$secondaryArchSuffix
-	devel:libQt5Widgets$secondaryArchSuffix
+	devel:libQt6Core$secondaryArchSuffix
+	devel:libQt6Gui$secondaryArchSuffix
+	devel:libQt6Network$secondaryArchSuffix
+	devel:libQt6Widgets$secondaryArchSuffix
 	"
 BUILD_PREREQUIRES="
 	cmd:gcc$secondaryArchSuffix
-	cmd:lrelease$secondaryArchSuffix >= 5
 	cmd:make
 	cmd:pkg_config$secondaryArchSuffix
-	cmd:qmake$secondaryArchSuffix >= 5
+	cmd:qmake6$secondaryArchSuffix
 	"
 
 defineDebugInfoPackage qalculate_qt$secondaryArchSuffix \
@@ -55,9 +55,9 @@ defineDebugInfoPackage qalculate_qt$secondaryArchSuffix \
 
 BUILD()
 {
-	qmake . PREFIX=$prefix \
+	qmake6 . PREFIX=$prefix \
 		MAN_DIR=$manDir \
-		TRANSLATIONS_DIR=$dataDir/Qt5/translations/qalculate-qt
+		TRANSLATIONS_DIR=$dataDir/Qt6/translations/qalculate-qt
 	make $jobArgs
 }
 
@@ -70,7 +70,7 @@ INSTALL()
 	# we are not linux
 	rm -rf $prefix/share
 
-	local APP_SIGNATURE="application/x-vnd.qt5-qalculate_qt"
+	local APP_SIGNATURE="application/x-vnd.Qt6-qalculate_qt"
 	local MAJOR="`echo "$portVersion" | cut -d. -f1`"
 	local MIDDLE="`echo "$portVersion" | cut -d. -f2`"
 	local MINOR="`echo "$portVersion" | cut -d. -f3`"