diff --git a/.github/workflows/build-windows-QT5.yml b/.github/workflows/build-windows-QT5.yml
index e5f5a5bf..6a563cdf 100644
--- a/.github/workflows/build-windows-QT5.yml
+++ b/.github/workflows/build-windows-QT5.yml
@@ -12,7 +12,7 @@ env:
   QWT_version: 6.1.6
   openCV_version: 4.6.0
   QT_version: 5.15.2
-  lapack_version: 3.11.0
+  lapack_version: 3.12.1
   mingw_version: 810
   python_version: 3.13
 
@@ -375,4 +375,3 @@ jobs:
           path: |
             DFTFringeInstaller_QT5_${{env.WORKFLOW_VERSION}}.exe
             DFTFringe.exe.debug
-
diff --git a/.github/workflows/build-windows.yml b/.github/workflows/build-windows.yml
index 07aed21e..a4cdcd7f 100644
--- a/.github/workflows/build-windows.yml
+++ b/.github/workflows/build-windows.yml
@@ -12,7 +12,7 @@ env:
   QWT_version: 6.3.0
   openCV_version: 4.12.0
   QT_version: 6.8.3
-  lapack_version: 3.11.0
+  lapack_version: 3.12.1
   mingw_version: 1310
   python_version: 3.13
 
@@ -203,10 +203,9 @@ jobs:
           repository: 'Reference-LAPACK/lapack'
           ref: 'v${{env.lapack_version}}'
           path: './lapack'
-      # See https://github.com/Reference-LAPACK/lapack/issues/305 : CMAKE_SHARED_LINKER_FLAGS is fixing a build issue
       - name: cmake generate
         if: steps.cache-lapack.outputs.cache-hit != 'true'
-        run: cmake -G "MinGW Makefiles" -S lapack -B build_lapack -D BUILD_SHARED_LIBS=ON -D CMAKE_SHARED_LINKER_FLAGS="-Wl,--allow-multiple-definition"
+        run: cmake -G "MinGW Makefiles" -S lapack -B build_lapack -D BUILD_SHARED_LIBS=ON
       - name: cmake build
         if: steps.cache-lapack.outputs.cache-hit != 'true'
         run: cmake --build ./build_lapack -j4
diff --git a/README.md b/README.md
index 36ef80cc..61840b86 100644
--- a/README.md
+++ b/README.md
@@ -169,11 +169,11 @@ mingw32-make -j4
 
 #### Build Lapack and Blas
 
-Get [Lapack](https://www.netlib.org/lapack/) source code version 3.11.0 in your prefered way (clone the repo, download the archive, homing pigeon, ...) and have it in folder named `C:\buildingDFTFringe\lapack`. Lapack comes with Blas.
+Get [Lapack](https://www.netlib.org/lapack/) source code version 3.12.1 in your prefered way (clone the repo, download the archive, homing pigeon, ...) and have it in folder named `C:\buildingDFTFringe\lapack`. Lapack comes with Blas.
 
 Then from within `C:\buildingDFTFringe` do the following:  
 ```
-cmake -G "MinGW Makefiles" -S lapack -B build_lapack -D BUILD_SHARED_LIBS=ON -D CMAKE_SHARED_LINKER_FLAGS="-Wl,--allow-multiple-definition"
+cmake -G "MinGW Makefiles" -S lapack -B build_lapack -D BUILD_SHARED_LIBS=ON
 cmake --build ./build_lapack -j4
 ```