diff --git a/mingw-w64-octave/PKGBUILD b/mingw-w64-octave/PKGBUILD
index 2e11f2f9d6..76146169c2 100644
--- a/mingw-w64-octave/PKGBUILD
+++ b/mingw-w64-octave/PKGBUILD
@@ -3,7 +3,7 @@
 _realname=octave
 pkgbase=mingw-w64-${_realname}
 pkgname=${MINGW_PACKAGE_PREFIX}-${_realname}
-pkgver=10.2.0
+pkgver=10.3.0
 pkgrel=1
 pkgdesc="GNU Octave: Interactive programming environment for numerical computations (mingw-w64)"
 arch=('any')
@@ -61,11 +61,11 @@ optdepends=("unzip: for decompressing .zip archives"
             "${MINGW_PACKAGE_PREFIX}-fltk: alternative plotting and dialogs"
             "${MINGW_PACKAGE_PREFIX}-gnuplot: alternative plotting"
             "${MINGW_PACKAGE_PREFIX}-portaudio: audio support")
-source=(https://ftp.gnu.org/gnu/octave/octave-$pkgver.tar.xz{,.sig}
+source=(https://ftpmirror.gnu.org/gnu/octave/octave-$pkgver.tar.xz{,.sig}
         "0003-no-community-support.patch"
         "0005-makeinfo-perl.patch")
 validpgpkeys=('DBD9C84E39FE1AAE99F04446B05F05B75D36644B')  # John W. Eaton
-sha256sums=('c9a0b0f83381866e816842e83eb35042d9dbc9d684557ba776e9e30292b2f76b'
+sha256sums=('92ae9bf2edcd288bd2df9fd0b4f7aa719b49d3940fceb154c5fdcd846f254da1'
             'SKIP'
             'e53af21ad087e10a2906506589aab89ab8b43f4e3e4994b4c28e4d8ae83639ad'
             '2df9666d75bb8dd4f549ec857c75aa3ec64b21fd3c9aa25a0d4127b284ec6822')
@@ -102,12 +102,13 @@ build() {
                     "--disable-lib-visibility-flags")
     # The headers from some dependent libraries (graphicsmagick++?) cause a
     # torrent of warnings about deprecated declarations.  Sometimes to the
-    # point that the build crashes with garbled characters in the terminal
+    # point where the build crashes with garbled characters in the terminal
     # output for some reason.  Same issue with dllimport attributes at
-    # inlined functions in Qt6 headers. Just calling `make all -j2` again in
-    # the build tree lets the compilation finish successfully.
+    # inlined functions and implicit conversion from 'const char16_t' to
+    # 'char32_t' in Qt6 headers. Just calling `make all -j2` again in the build
+    # tree lets the compilation finish successfully.
     # Disable those warnings as a work-around.
-    CXXFLAGS+=" -Wno-deprecated-declarations -Wno-ignored-attributes"
+    CXXFLAGS+=" -Wno-deprecated-declarations -Wno-ignored-attributes -Wno-character-conversion"
   fi
 
   ../${_realname}-${pkgver}/configure \