diff --git a/.github/workflows/build-starpp-linux.yml b/.github/workflows/build-starpp-linux.yml
index 531dcef..071eb19 100644
--- a/.github/workflows/build-starpp-linux.yml
+++ b/.github/workflows/build-starpp-linux.yml
@@ -58,7 +58,7 @@ jobs:
     - name: Install Qt (custom build)
       uses: oblivioncth/actions/general/install-and-cache-qt-from-ffynnon@dev
       with:
-        version: 6.4.2
+        version: 6.6.0
         os: linux
         compiler: ${{ matrix.qt_comp }}
         linkage: ${{ matrix.lib_linkage }}
@@ -67,7 +67,7 @@ jobs:
     - name: Install Doxygen
       uses: oblivioncth/actions/ubuntu/install-doxygen-from-sourceforge@dev
       with:
-        version: 1.9.4
+        version: 1.9.8
     - name: Install Graphviz
       run: sudo apt-get install graphviz
     - name: Install Ninja
diff --git a/.github/workflows/build-starpp-windows.yml b/.github/workflows/build-starpp-windows.yml
index b074b8b..84ba87c 100644
--- a/.github/workflows/build-starpp-windows.yml
+++ b/.github/workflows/build-starpp-windows.yml
@@ -43,7 +43,7 @@ jobs:
     - name: Install Qt (custom build)
       uses: oblivioncth/actions/general/install-and-cache-qt-from-ffynnon@dev
       with:
-        version: 6.4.2
+        version: 6.6.0
         os: windows
         compiler: msvc2022
         linkage: ${{ matrix.lib_linkage }}
@@ -52,7 +52,7 @@ jobs:
     - name: Install Doxygen
       uses: oblivioncth/actions/general/cache-and-install-doxygen-from-ffynnon@dev
       with:
-        version: 1.9.4
+        version: 1.9.8
         os: windows
         credentials: ${{ secrets.qt_ffynnon_cred }}
     - name: Install Graphviz