diff --git a/.github/workflows/build_installer.yml b/.github/workflows/build_installer.yml
index a29001e68..088635c53 100644
--- a/.github/workflows/build_installer.yml
+++ b/.github/workflows/build_installer.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4.1.1
         with:
           submodules: recursive
 
@@ -60,7 +60,7 @@ jobs:
           echo "INSTALLER_DIR=$(cygpath -m ${INSTALLER_DIR})" >> $GITHUB_OUTPUT
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4.3.1
         with:
           name:  ${{ steps.build.outputs.INSTALLER_NAME }}
           path:  ${{ steps.build.outputs.INSTALLER_DIR }}
@@ -74,7 +74,7 @@ jobs:
 
     steps:
       - name: Checkout branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4.1.1
         with:
           submodules: recursive
 
@@ -126,13 +126,13 @@ jobs:
           echo "SYMBOLS_DIR=$(cygpath -m ${SYMBOLS_DIR})" >> $GITHUB_OUTPUT
 
       - name: Upload installer
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4.3.1
         with:
           name:  ${{ steps.build.outputs.INSTALLER_NAME }}
           path:  ${{ steps.build.outputs.INSTALLER_DIR }}
 
       - name: Upload symbols
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4.3.1
         with:
           name:  ${{ steps.build.outputs.SYMBOLS_NAME }}
           path:  ${{ steps.build.outputs.SYMBOLS_DIR }}
diff --git a/.github/workflows/build_pacman_repo.yml b/.github/workflows/build_pacman_repo.yml
index bba04eb2c..71a9bbc49 100644
--- a/.github/workflows/build_pacman_repo.yml
+++ b/.github/workflows/build_pacman_repo.yml
@@ -27,7 +27,7 @@ jobs:
         shell: msys2 {0}
     steps:
       - name: Checkout branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4.1.1
         with:
           submodules: recursive
       - name: Setup MinGW environment
@@ -44,7 +44,7 @@ jobs:
           pacman -Sl mingw64 msys > mingw-package-version-list.txt
       - name: Restore natron repo directory from cache
         id: restore-natron-repo-cache
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4.0.0
         with:
           path: natron_repo
           key: ${{ env.cache-name }}-${{ hashFiles('mingw-package-version-list.txt', 'tools/MINGW-packages/**/PKGBUILD') }}
@@ -59,14 +59,14 @@ jobs:
           echo "REPO_VERSION=${REPO_VERSION}" >> "$GITHUB_OUTPUT"
       - name: Save natron repo directory to cache
         id: save-natron-repo-cache
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4.0.0
         # save even if build fails.
         if: always()
         with:
           path: natron_repo
           key: ${{ env.cache-name }}-${{ hashFiles('mingw-package-version-list.txt', 'tools/MINGW-packages/**/PKGBUILD') }}
       - name: Upload natron_package_repo artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4.3.1
         with:
           name: natron_package_repo-${{ steps.build-package-repo.outputs.REPO_VERSION }}
           path: natron_repo
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b263e5a61..116eafaeb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,7 +6,6 @@ on:
     branches:
     - RB-2.5
     - RB-2.6
-    - fix-ci # For testing. Remove before commit.
     paths-ignore:
       - Documentation
   pull_request:
@@ -40,7 +39,7 @@ jobs:
           python-version: '3.10'
     steps:
       - name: Checkout branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4.1.1
         with:
           submodules: recursive
       - name: Install Linux system packages
@@ -102,7 +101,7 @@ jobs:
           OFX_PLUGIN_PATH=$PWD/../Plugins OCIO=$PWD/../OpenColorIO-Configs/blender/config.ocio ctest -V
 
       - name: Upload ${{ matrix.os }} Test Log artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4.3.1
         with:
           name: ${{ matrix.os }} Test Logs
           path: ${{ github.workspace }}/release/Testing/Temporary/LastTest.log
@@ -130,7 +129,7 @@ jobs:
         python-version: ['3.10']
     steps:
       - name: Checkout branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4.1.1
         with:
           submodules: recursive
 
@@ -173,7 +172,7 @@ jobs:
           PYTHONHOME=/mingw64 OFX_PLUGIN_PATH=$PWD/Plugins OCIO=$PWD/../OpenColorIO-Configs/blender/config.ocio ctest -V
 
       - name: Upload ${{ matrix.os }} Test Log artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4.3.1
         with:
           name: ${{ matrix.os }} Test Logs
           path: ${{ github.workspace }}/build/Testing/Temporary/LastTest.log