diff --git a/extra/cantor/PKGBUILD b/extra/cantor/PKGBUILD
index bd35bad9b..034c569c5 100644
--- a/extra/cantor/PKGBUILD
+++ b/extra/cantor/PKGBUILD
@@ -6,14 +6,14 @@
 #  - drop julia make/optdepends, doesn't build on ARM
 
 pkgname=cantor
-pkgver=21.04.3
-pkgrel=2
+pkgver=21.08.0
+pkgrel=1
 pkgdesc='KDE Frontend to Mathematical Software'
 url='https://apps.kde.org/cantor/'
 arch=(x86_64)
 license=(GPL LGPL FDL)
 groups=(kde-applications kde-education)
-depends=(analitza libspectre kpty ktexteditor knewstuff libqalculate hicolor-icon-theme qt5-xmlpatterns poppler-qt5)
+depends=(analitza libspectre kpty ktexteditor knewstuff libqalculate qt5-xmlpatterns qt5-tools qt5-webengine poppler-qt5)
 makedepends=(extra-cmake-modules python kdoctools luajit r)
 optdepends=('maxima: Maxima backend'
             'octave: Octave backend'
@@ -23,7 +23,7 @@ optdepends=('maxima: Maxima backend'
             'sagemath: SageMath backend'
             'julia: Julia backend')
 source=(https://download.kde.org/stable/release-service/$pkgver/src/$pkgname-$pkgver.tar.xz{,.sig})
-sha256sums=('f127067d1f4d1d89e0a26d6ef199a2e2fa093847563b6651587c8c360eae30d2'
+sha256sums=('f1408908d741ab46c365138df83d1a660413dda76e4b09294e7268504b1ff460'
             'SKIP')
 validpgpkeys=(CA262C6C83DE4D2FB28A332A3A6A4DB839EAA6D7  # Albert Astals Cid <aacid@kde.org>
               F23275E4BF10AFC1DF6914A6DBD2CE893E2D1C87  # Christoph Feck <cfeck@kde.org>