diff --git a/Projects/Athena/build_externals.sh b/Projects/Athena/build_externals.sh
index d9a669edb0c8b7839d064d8bcf942ae8d834755e..e9c103c1797ac18b8ffc9cf3ca7283bc05ef3ca4 100755
--- a/Projects/Athena/build_externals.sh
+++ b/Projects/Athena/build_externals.sh
@@ -12,7 +12,7 @@ ATLAS_BUILDTYPE="Release"
 ATLAS_EXTRA_CMAKE_ARGS=(-DLCG_VERSION_NUMBER=107
                         -DLCG_VERSION_POSTFIX="_ATLAS_3"
                         -DATLAS_GAUDI_SOURCE="URL;https://gitlab.cern.ch/atlas/Gaudi/-/archive/v39r2.000/Gaudi-v39r2.000.tar.gz;URL_MD5;72cf6f13c9461ab0a0e8447af80e092b"
-                        -DATLAS_ACTS_SOURCE="URL;https://github.com/acts-project/acts/archive/refs/tags/v39.0.0.tar.gz;URL_HASH;SHA256=1c762b6194edd1b12db93822030e28cc34c41d3ea0c30239b08f727371ac3181"
+                        -DATLAS_ACTS_SOURCE="URL;https://github.com/acts-project/acts/archive/refs/tags/v39.1.0.tar.gz;URL_HASH;SHA256=6f0dadfeefae927e96049c4d4061d67f2b5a10f392524968055bfcaae5439ea8"
                         -DATLAS_GEOMODEL_SOURCE="URL;https://gitlab.cern.ch/GeoModelDev/GeoModel/-/archive/6.9.0/GeoModel-6.9.0.tar.bz2;URL_MD5;4696042fd5dbb95be6d76197097b5ed4"
                         -DATLAS_VECMEM_SOURCE="URL;http://cern.ch/atlas-software-dist-eos/externals/vecmem/v1.5.0.tar.gz;https://github.com/acts-project/vecmem/archive/refs/tags/v1.5.0.tar.gz;URL_MD5;3cc5a3bb14b93f611513535173a6be28"
                         -DATLAS_GEANT4_USE_LTO=TRUE