diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2e7e1f544..f89bdfe86 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.10"]
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest]
 
     steps:
     - uses: actions/checkout@v4
@@ -24,24 +24,20 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
-    - uses: fortran-lang/setup-fortran@v1
-      id: setup-fortran
-      with:
-        compiler: gcc
-        version: 11
 
     - name: install dependencies
       run: pip install numpy
 
     - name: build splinepy minimal/debug/warning
-      if: matrix.os != 'windows-latest'
-      run: |
-        pip install ".[test]" -v --config-settings=cmake.args="-DSPLINEPY_MORE=OFF;-DSPLINEPY_ENABLE_WARNINGS=ON" --config-settings=cmake.build-type="Debug"
+      uses: fortran-lang/setup-fortran@v1
+      id: setup-fortran
+      with:
+        compiler: gcc
+        version: 11
 
-    - name: build splinepy windows
-      if: matrix.os == 'windows-latest'
+    - name: build
       run: |
-        pip install ".[test]" -v --config-settings=cmake.args="-DSPLINEPY_MORE=OFF"
+        pip install ".[test]" -v --config-settings=cmake.args="-DSPLINEPY_MORE=OFF;-DSPLINEPY_ENABLE_WARNINGS=ON" --config-settings=cmake.build-type="Debug"
 
     - name: test
       run: |
diff --git a/.github/workflows/test_full.yml b/.github/workflows/test_full.yml
index dbf68799c..9cdf8d6a7 100644
--- a/.github/workflows/test_full.yml
+++ b/.github/workflows/test_full.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         python-version: [3.8, 3.9, "3.10", "3.11", "3.12"]
-        os: [ubuntu-20.04, macos-latest, windows-latest]
+        os: [ubuntu-20.04, macos-latest]
 
     steps:
     - uses: actions/checkout@v4
@@ -26,7 +26,8 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
-    - uses: fortran-lang/setup-fortran@v1
+    - name: setup fortran non window
+      uses: fortran-lang/setup-fortran@v1
       id: setup-fortran
       with:
         compiler: gcc
diff --git a/.github/workflows/test_wheels.yml b/.github/workflows/test_wheels.yml
index b69d15f74..2f02a2561 100644
--- a/.github/workflows/test_wheels.yml
+++ b/.github/workflows/test_wheels.yml
@@ -23,7 +23,6 @@ jobs:
         CIBW_ARCHS: ${{ matrix.arch }}
         CIBW_BUILD: ${{ matrix.cw_build }}
         CIBW_TEST_SKIP: "*-macosx_arm64"
-        FC: "gfortran"
         SPLINEPY_GITHUB_ACTIONS_BUILD: True
 
     - uses: actions/upload-artifact@v3
diff --git a/.github/workflows/test_windows.yml b/.github/workflows/test_windows.yml
new file mode 100644
index 000000000..d2684d437
--- /dev/null
+++ b/.github/workflows/test_windows.yml
@@ -0,0 +1,44 @@
+name: Test build on windows
+
+on:
+  push
+
+permissions:
+  contents: read
+
+jobs:
+  build_and_tests:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        python-version: [3.8, 3.9, "3.10", "3.11", "3.12"]
+        os: [windows-latest]
+
+    steps:
+    - name: build splinepy windows
+      uses: fortran-lang/setup-fortran@v1
+      id: setup-fortran
+      with:
+        compiler: ifx
+
+    - uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: Set up  ${{ matrix.python-version }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+
+
+    - name: install dependencies
+      run: pip install numpy
+
+    - name: build windows
+      run: |
+        pip install ".[test]" -v --config-settings=cmake.args="-DSPLINEPY_MORE=OFF"
+
+    - name: test
+      run: |
+        pytest tests
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 817faee53..9a7d6abdd 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -36,7 +36,7 @@ endif(SPLINEPY_MORE)
 
 add_library(slsqp ${SPLINEPY_SLSQP_SRCS})
 add_library(splinepy::slsqp ALIAS slsqp)
-target_compile_options(slsqp PRIVATE -O3 -std=legacy)
+target_compile_options(slsqp PRIVATE -std=legacy -O3 -fPIC)
 
 # target
 add_library(splinepy ${SPLINEPY_LIB_TYPE} ${SPLINEPY_SRCS})