diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e231eab..937f7b5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -15,23 +15,13 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, ubuntu-22.04, macos-11, macos-12]
-        compiler: [gfortran-9, gfortran-10, gfortran-11, gfortran-12]
+        os: [ubuntu-22.04, macos-11, macos-12]
+        compiler: [gfortran-10, gfortran-11, gfortran-12, gfortran-13]
         exclude:
-          - os: ubuntu-20.04
-            compiler: gfortran-11
-          - os: ubuntu-20.04
-            compiler: gfortran-12
-          - os: ubuntu-22.04
-            compiler: gfortran-9
           - os: macos-11
-            compiler: gfortran-12
-          - os: macos-12
-            compiler: gfortran-9
+            compiler: gfortran-13
           - os: macos-12
             compiler: gfortran-10
-          - os: macos-12
-            compiler: gfortran-12
 
       # fail-fast if set to 'true' here is good for production, but when
       # debugging, set to 'false'. fail-fast means if *any* ci test in the matrix fails
@@ -52,37 +42,43 @@ jobs:
 
     name: ${{ matrix.os }} / ${{ matrix.compiler }}
     steps:
-      - name: Install GCC 12 on Ubuntu 22.04
-        if: matrix.os == 'ubuntu-22.04' && matrix.compiler == 'gfortran-12'
-        run: |
-          sudo apt-get install gfortran-12 -y
       - name: Compiler Versions
         run: |
           ${FC} --version
           cmake --version
+
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 1
+
+      - name: Set all directories as git safe
+        run: |
+          git config --global --add safe.directory '*'
+
       - name: Build GFE Prereqs
         run: |
           bash ./tools/ci-install-gfe.bash
+
       - name: Build pFlogger
         run: |
           mkdir -p build
           cd build
           cmake .. -DCMAKE_Fortran_COMPILER=${FC} -DCMAKE_INSTALL_PREFIX=${HOME}/Software/pFlogger -DCMAKE_PREFIX_PATH=${HOME}/Software/GFE
           make -j$(nproc)
+
       - name: Build Tests
         run: |
           cd build
           make -j$(nproc) tests
+
       - name: Run Tests
         run: |
           cd build
           ctest -j1 --output-on-failure --repeat until-pass:4
+
       - name: Archive log files on failure
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: logfiles
@@ -93,49 +89,72 @@ jobs:
     runs-on: ubuntu-20.04
 
     env:
-      FC: ifort
-      CC: icc
+      FC: ifx
+      CC: icx
 
     name: Intel Fortran
     steps:
-      - name: Install Intel compilers
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Set all directories as git safe
+        run: |
+          git config --global --add safe.directory '*'
+
+      - name: Setup Intel oneAPI repository
         run: |
-          cd /tmp
           wget https://apt.repos.intel.com/intel-gpg-keys/GPG-PUB-KEY-INTEL-SW-PRODUCTS.PUB
           sudo apt-key add GPG-PUB-KEY-INTEL-SW-PRODUCTS.PUB
-          rm GPG-PUB-KEY-INTEL-SW-PRODUCTS.PUB
           sudo add-apt-repository "deb https://apt.repos.intel.com/oneapi all main"
-          sudo apt install --no-install-recommends intel-oneapi-compiler-fortran intel-oneapi-mpi \
-            intel-oneapi-compiler-dpcpp-cpp-and-cpp-classic intel-oneapi-mpi-devel
+          sudo apt-get update
+
+      - name: Install Intel oneAPI compilers
+        timeout-minutes: 5
+        run: sudo apt-get install intel-oneapi-compiler-fortran intel-oneapi-compiler-dpcpp-cpp
+
+      # optional
+      - name: Install Intel MPI
+        timeout-minutes: 5
+        run: sudo apt-get install intel-oneapi-mpi intel-oneapi-mpi-devel
+
+      - name: Setup Intel oneAPI environment
+        run: |
           source /opt/intel/oneapi/setvars.sh
           printenv >> $GITHUB_ENV
-      - name: Compiler Versions
+          printenv | grep intel
+
+      - name: Versions
         run: |
           ${FC} --version
+          ${CC} --version
+          mpirun --version
           cmake --version
-      - name: Checkout
-        uses: actions/checkout@v2
-        with:
-          fetch-depth: 1
+
       - name: Build GFE Prereqs
         run: |
           bash ./tools/ci-install-gfe.bash
+
       - name: Build pFlogger
         run: |
           mkdir -p build
           cd build
-          cmake .. -DCMAKE_Fortran_COMPILER=${FC} -DCMAKE_INSTALL_PREFIX=${HOME}/Software/yaFyaml -DCMAKE_PREFIX_PATH=${HOME}/Software/GFE
+          cmake .. -DCMAKE_Fortran_COMPILER=${FC} -DCMAKE_INSTALL_PREFIX=${HOME}/Software/pFlogger -DCMAKE_PREFIX_PATH=${HOME}/Software/GFE
           make -j$(nproc)
+
       - name: Build Tests
         run: |
           cd build
           make -j$(nproc) tests
+
       - name: Run Tests
         run: |
           cd build
           ctest -j1 --output-on-failure --repeat until-pass:4
+
       - name: Archive log files on failure
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: logfiles
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ef08395..20c7d17 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,7 @@
 # ------------------------------------------------------------------------ #
 cmake_minimum_required (VERSION 3.12)
 project (PFLOGGER
-  VERSION 1.11.0
+  VERSION 1.12.0
   LANGUAGES Fortran)
 
 set (CMAKE_MODULE_PATH
@@ -43,7 +43,10 @@ if (NOT TARGET YAFYAML::yafyaml)
   find_package (YAFYAML REQUIRED VERSION 1.1.0)
 endif ()
 
-find_package (MPI QUIET)
+option (ENABLE_MPI "Enable MPI support" ON)
+if (ENABLE_MPI)
+  find_package (MPI QUIET)
+endif ()
 find_package (PFUNIT QUIET)
 
 #-----------------------------------
diff --git a/ChangeLog.md b/ChangeLog.md
index a6b6ad1..f6fd87b 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.12.0] - 2024-01-25
+
+### Changed
+
+- Add new `ENABLE_MPI` option to allow disabling MPI support (#106). By default, MPI is enabled to maintain backward compatibility.
+
 ## [1.11.0] - 2023-11-29
 
 ### Fixed