diff --git a/.github/workflows/macos-homebrew-xapian.yml b/.github/workflows/macos-homebrew-xapian.yml
index fe8c720b..58df2212 100644
--- a/.github/workflows/macos-homebrew-xapian.yml
+++ b/.github/workflows/macos-homebrew-xapian.yml
@@ -22,7 +22,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-11,macos-12]
-        qt_ver: [6.5.1]
+        qt_ver: [6.4.3]
         qt_arch: [clang_64]
     env:
       targetName: GoldenDict
diff --git a/.github/workflows/ubuntu-6.2-xapian.yml b/.github/workflows/ubuntu-6.2-xapian.yml
index 4fc3dbf9..ab983e1d 100644
--- a/.github/workflows/ubuntu-6.2-xapian.yml
+++ b/.github/workflows/ubuntu-6.2-xapian.yml
@@ -26,7 +26,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        qt_ver: [6.5.1]
+        qt_ver: [6.4.3]
         qt_arch: [gcc_64]
     env:
       version: 23.06.02
diff --git a/.github/workflows/windows-6.x-xapian.yml b/.github/workflows/windows-6.x-xapian.yml
index 0e2a4f51..8e9ae3fb 100644
--- a/.github/workflows/windows-6.x-xapian.yml
+++ b/.github/workflows/windows-6.x-xapian.yml
@@ -27,7 +27,7 @@ jobs:
     strategy:
       matrix:
         os: [windows-2019]
-        qt_ver: [6.5.1]
+        qt_ver: [6.4.3]
         qt_arch: [win64_msvc2019_64]
     env:
       targetName: GoldenDict.exe