diff --git a/build-telemac-deps.bat b/build-telemac-deps.bat
index 22d033e8f703d0967c292b9b7f5bb6753febfb62..5325ad1de127a275cdeec6188f0e3150ea2e4ca4 100644
--- a/build-telemac-deps.bat
+++ b/build-telemac-deps.bat
@@ -12,7 +12,7 @@ set metis=metis-5.1.0
 set msmpi=msmpi-10.1.2
 set openblas=openblas-0.3.21
 set scalapack=scalapack-2.1.0
-set mumps=mumps-5.4.1
+set mumps=mumps-5.2.1
 set aed2=libaed2-1.2.0
 set gotm=gotm-2019-06-14-opentelemac
 
@@ -235,7 +235,7 @@ rem MUMPS
 rem *****
 :build_mumps
 call :download %mumps% "https://github.com/scivision/mumps/archive/refs/tags/v5.4.1.11.zip" || exit /b 1
-set cmake_config_options=-DBLAS_LIBRARY=%install_path%/%openblas%/lib/libopenblas.a -DLAPACK_LIBRARY=%install_path%/%openblas%/lib/libopenblas.a -DSCALAPACK_ROOT:PATH=%install_path%/%scalapack%
+set cmake_config_options=-DMUMPS_UPSTREAM_VERSION=5.2.1 -DBLAS_LIBRARY=%install_path%/%openblas%/lib/libopenblas.a -DLAPACK_LIBRARY=%install_path%/%openblas%/lib/libopenblas.a -DSCALAPACK_ROOT:PATH=%install_path%/%scalapack%
 if %compiler% == mingw (
   set cmake_config_options=%cmake_config_options% -DMPI_ROOT:PATH=%install_path%/%msmpi%
 ) else (
diff --git a/config/pysource.win.bat b/config/pysource.win.bat
index 5715abd55c8ab8323e963feee035196c09de73ab..64caa4b59a072c7fa0064cebc81bef2d97883566 100644
--- a/config/pysource.win.bat
+++ b/config/pysource.win.bat
@@ -44,7 +44,7 @@ set PATH=%MPIHOME%\bin;%PATH%
 rem OPENBLAS, SCALAPACK and MUMPS
 set OPENBLASHOME=%TELEMACDEPS%\openblas-0.3.21
 set SCALAPACKHOME=%TELEMACDEPS%\scalapack-2.1.0
-set MUMPSHOME=%TELEMACDEPS%\mumps-5.4.1
+set MUMPSHOME=%TELEMACDEPS%\mumps-5.2.1
 rem AED
 set AEDHOME=%TELEMACDEPS%\libaed2-1.2.0
 rem GOTM
diff --git a/config/pysource.win.debug.bat b/config/pysource.win.debug.bat
index af67ffe77f3e44590320e26e8c3d681a725b8a71..183cd7c0220bcc77664546f1b7bfb6b87955517a 100644
--- a/config/pysource.win.debug.bat
+++ b/config/pysource.win.debug.bat
@@ -44,7 +44,7 @@ set PATH=%MPIHOME%\bin;%PATH%
 rem OPENBLAS, SCALAPACK and MUMPS
 set OPENBLASHOME=%TELEMACDEPS%\openblas-0.3.21
 set SCALAPACKHOME=%TELEMACDEPS%\scalapack-2.1.0
-set MUMPSHOME=%TELEMACDEPS%\mumps-5.4.1
+set MUMPSHOME=%TELEMACDEPS%\mumps-5.2.1
 rem AED
 set AEDHOME=%TELEMACDEPS%\libaed2-1.2.0
 rem GOTM