diff --git a/resources/scripts/github-actions/build-linux-mac.sh b/resources/scripts/github-actions/build-linux-mac.sh
index 2daf985c7..065abf0ac 100755
--- a/resources/scripts/github-actions/build-linux-mac.sh
+++ b/resources/scripts/github-actions/build-linux-mac.sh
@@ -54,7 +54,8 @@ else
   QTVERSION="6.4.3"
   QTBIN="$QTPATH/$QTVERSION/$QTOS/bin"
 
-  pip3 install aqtinstall
+  # Install "aqtinstall" from its master branch to have latest code.
+  pip3 install -I git+https://github.com/miurahr/aqtinstall
 
   echo "Qt bin directory is: $QTBIN"
   echo "Qt will be installed to: $QTPATH"
diff --git a/resources/scripts/github-actions/build-windows.ps1 b/resources/scripts/github-actions/build-windows.ps1
index 026eccb74..24dacdbae 100755
--- a/resources/scripts/github-actions/build-windows.ps1
+++ b/resources/scripts/github-actions/build-windows.ps1
@@ -44,8 +44,10 @@ $cmake_path = "$old_pwd\cmake-$cmake_version-windows-x86_64\bin\cmake.exe"
 
 # Download Qt itself.
 $qt_path = "$old_pwd\qt"
+
+# Install "aqtinstall" from its master branch to have latest code.
 pip3 install -U pip
-pip3 install -I aqtinstall
+pip3 install -I git+https://github.com/miurahr/aqtinstall
 
 if ($qt_version.StartsWith("6")) {
   aqt install-qt -O "$qt_path" windows desktop $qt_version win64_msvc2019_64 -m qtwebengine qtimageformats qtmultimedia qt5compat qtwebchannel qtpositioning