diff --git a/easybuild/easyconfigs/q/QCMaquis/QCMaquis-3.1.4-iomkl-2023a.eb b/easybuild/easyconfigs/q/QCMaquis/QCMaquis-4.0.0-iomkl-2023a.eb
index b24943be06..0b337e91ce 100644
--- a/easybuild/easyconfigs/q/QCMaquis/QCMaquis-3.1.4-iomkl-2023a.eb
+++ b/easybuild/easyconfigs/q/QCMaquis/QCMaquis-4.0.0-iomkl-2023a.eb
@@ -1,21 +1,22 @@
 easyblock = 'CMakeMake'
 
 name = 'QCMaquis'
-version = '3.1.4'
+version = '4.0.0'
 
 homepage = "https://github.com/qcscine/qcmaquis"
-description = """QCMaquis is written in C++ (C++14 standard) and parallelizes the computationally heavy steps of
+description = """QCMaquis parallelizes the computationally heavy steps of
 a DMRG simulation with shared-memory parallelism (OpenMP)."""
 
 toolchain = {'name': 'iomkl', 'version': '2023a'}
-# disable optarch and use strict to pass tests
-toolchainopts = {'openmp': True, 'optarch': False, 'strict': True}
 
 source_urls = ['https://github.com/qcscine/qcmaquis/archive']
-sources = [{'download_filename': 'release-%(version)s.tar.gz', 'filename': SOURCE_TAR_GZ}]
-checksums = ['98eaa0a057a8f056ebeab8427c8b59efaf2d71667a2d71491b900adbe0d29341']
+sources = [{'download_filename': 'v%(version)s.tar.gz', 'filename': SOURCE_TAR_GZ}]
+checksums = ['47278e6af537cbd244d6284f7f5164b8169d8d76c0e150aca4774571dde5cda3']
 
-builddependencies = [('CMake', '3.26.3')]
+builddependencies = [
+    ('CMake', '3.26.3'),
+    ('Eigen', '3.4.0'),
+]
 
 dependencies = [
     ('HDF5', '1.14.0', '-serial'),
@@ -23,21 +24,16 @@ dependencies = [
     ('Boost', '1.82.0'),
 ]
 
-start_dir = 'dmrg'
-
 # preprocess fortran sources by -fpp
 configopts = '-DBUILD_OPENMOLCAS_INTERFACE=ON -DCMAKE_Fortran_FLAGS="$FFLAGS -fpp" -DQCMAQUIS_TESTS=ON'
 
-# fix build of test_wigner
-prebuildopts = "sed -i '14i#include <array>' %(start_dir)s/tests/test_wigner.cpp && "
-
 runtest = True
 
 sanity_check_paths = {
-    'files': ['bin/dmrgIPI', 'include/maquis_dmrg.h', 'lib/libmaquis_dmrg.%s' % SHLIB_EXT],
-    'dirs': ['include', 'share/qcmaquis'],
+    'files': ['bin/dmrg_meas', 'include/maquis_dmrg.h', 'lib/libmaquis_dmrg.%s' % SHLIB_EXT],
+    'dirs': ['include', 'share/%(namelower)s'],
 }
 
-sanity_check_commands = ['dmrgIPI --help']
+sanity_check_commands = ['dmrg_meas --help']
 
 moduleclass = 'chem'