diff --git a/Projects/AthAnalysis/build_externals.sh b/Projects/AthAnalysis/build_externals.sh
index 98a622c1ed283757674955f1441b2b24c0931ca4..84d66ad92a61a75a49fcee85ad003e941cb778df 100755
--- a/Projects/AthAnalysis/build_externals.sh
+++ b/Projects/AthAnalysis/build_externals.sh
@@ -12,7 +12,7 @@ ATLAS_BUILDTYPE="RelWithDebInfo"
 ATLAS_EXTRA_CMAKE_ARGS=(-DLCG_VERSION_NUMBER=106
                         -DLCG_VERSION_POSTFIX="_ATLAS_3"
                         -DATLAS_ONNXRUNTIME_USE_CUDA=FALSE
-                        -DATLAS_GAUDI_SOURCE="URL;https://gitlab.cern.ch/atlas/Gaudi/-/archive/v38r2.000/Gaudi-v38r2.000.tar.gz;URL_MD5;739b777252581eb13dd159532ea19985")
+                        -DATLAS_GAUDI_SOURCE="URL;https://gitlab.cern.ch/atlas/Gaudi/-/archive/v38r3.000/Gaudi-v38r3.000.tar.gz;URL_MD5;a298a4ed0cc4029fb5c725adfb9d24ac")
 ATLAS_EXTRA_MAKE_ARGS=()
 
 # Let "the common script" do all the heavy lifting.
diff --git a/Projects/AthGeneration/build_externals.sh b/Projects/AthGeneration/build_externals.sh
index 9a6ee59615747759be4eb504db3fcc5d13b4c993..1ca983d249bbfd66daa78f5b61fc925235481679 100755
--- a/Projects/AthGeneration/build_externals.sh
+++ b/Projects/AthGeneration/build_externals.sh
@@ -11,7 +11,7 @@ ATLAS_EXT_PROJECT_NAME="AthGenerationExternals"
 ATLAS_BUILDTYPE="RelWithDebInfo"
 ATLAS_EXTRA_CMAKE_ARGS=(-DLCG_VERSION_NUMBER=106
                         -DLCG_VERSION_POSTFIX="_ATLAS_3"
-                        -DATLAS_GAUDI_SOURCE="URL;https://gitlab.cern.ch/atlas/Gaudi/-/archive/v38r2.000/Gaudi-v38r2.000.tar.gz;URL_MD5;739b777252581eb13dd159532ea19985"
+                        -DATLAS_GAUDI_SOURCE="URL;https://gitlab.cern.ch/atlas/Gaudi/-/archive/v38r3.000/Gaudi-v38r3.000.tar.gz;URL_MD5;a298a4ed0cc4029fb5c725adfb9d24ac"
                         -DATLAS_GEOMODEL_SOURCE="URL;https://gitlab.cern.ch/GeoModelDev/GeoModel/-/archive/6.3.0/GeoModel-6.3.0.tar.bz2;URL_MD5;4e42239acfd362ac33b31a6d563c128e")
 ATLAS_EXTRA_MAKE_ARGS=()
 
diff --git a/Projects/AthSimulation/build_externals.sh b/Projects/AthSimulation/build_externals.sh
index 3821ce210d72ed04220533f3ea4d164c28951df7..05a59ae3dab4359c418e08149b30a00c240835ce 100755
--- a/Projects/AthSimulation/build_externals.sh
+++ b/Projects/AthSimulation/build_externals.sh
@@ -11,7 +11,7 @@ ATLAS_EXT_PROJECT_NAME="AthSimulationExternals"
 ATLAS_BUILDTYPE="RelWithDebInfo"
 ATLAS_EXTRA_CMAKE_ARGS=(-DLCG_VERSION_NUMBER=106
                         -DLCG_VERSION_POSTFIX="_ATLAS_3"
-                        -DATLAS_GAUDI_SOURCE="URL;https://gitlab.cern.ch/atlas/Gaudi/-/archive/v38r2.000/Gaudi-v38r2.000.tar.gz;URL_MD5;739b777252581eb13dd159532ea19985"
+                        -DATLAS_GAUDI_SOURCE="URL;https://gitlab.cern.ch/atlas/Gaudi/-/archive/v38r3.000/Gaudi-v38r3.000.tar.gz;URL_MD5;a298a4ed0cc4029fb5c725adfb9d24ac"
                         -DATLAS_GEOMODEL_SOURCE="URL;https://gitlab.cern.ch/GeoModelDev/GeoModel/-/archive/6.3.0/GeoModel-6.3.0.tar.bz2;URL_MD5;4e42239acfd362ac33b31a6d563c128e"
                         -DATLAS_GEANT4_USE_LTO=TRUE
                         -DATLAS_VECGEOM_USE_LTO=TRUE)
diff --git a/Projects/Athena/build_externals.sh b/Projects/Athena/build_externals.sh
index a4d2d2f8683f9afdb5535f5736bfb0958715361a..63ea456bb04ec4fda720486b2d207d64f165e422 100755
--- a/Projects/Athena/build_externals.sh
+++ b/Projects/Athena/build_externals.sh
@@ -11,7 +11,7 @@ ATLAS_EXT_PROJECT_NAME="AthenaExternals"
 ATLAS_BUILDTYPE="RelWithDebInfo"
 ATLAS_EXTRA_CMAKE_ARGS=(-DLCG_VERSION_NUMBER=106
                         -DLCG_VERSION_POSTFIX="_ATLAS_3"
-                        -DATLAS_GAUDI_SOURCE="URL;https://gitlab.cern.ch/atlas/Gaudi/-/archive/v38r2.000/Gaudi-v38r2.000.tar.gz;URL_MD5;739b777252581eb13dd159532ea19985"
+                        -DATLAS_GAUDI_SOURCE="URL;https://gitlab.cern.ch/atlas/Gaudi/-/archive/v38r3.000/Gaudi-v38r3.000.tar.gz;URL_MD5;a298a4ed0cc4029fb5c725adfb9d24ac"
                         -DATLAS_ACTS_SOURCE="URL;https://github.com/acts-project/acts/archive/refs/tags/v35.1.0.tar.gz;URL_HASH;SHA256=fa8f975c4238c9d3c5cc4c83d074787b224c823d8d1b98011ea905f884f3f410"
                         -DATLAS_GEOMODEL_SOURCE="URL;https://gitlab.cern.ch/GeoModelDev/GeoModel/-/archive/6.3.0/GeoModel-6.3.0.tar.bz2;URL_MD5;4e42239acfd362ac33b31a6d563c128e"
                         -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"