diff --git a/Calorimeter/CaloRecGPU/CMakeLists.txt b/Calorimeter/CaloRecGPU/CMakeLists.txt
index 685181e770a5c12bad82a5e12087291246bcc26b..062996ae4c1ce4f2ba703c4679b3c7a301e51399 100644
--- a/Calorimeter/CaloRecGPU/CMakeLists.txt
+++ b/Calorimeter/CaloRecGPU/CMakeLists.txt
@@ -1,9 +1,5 @@
 # Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 
-
-# This package needs CUDA to be handled as a "first class language" by CMake.
-cmake_minimum_required(VERSION 3.11)
-
 # Set the name of the package.
 atlas_subdir( CaloRecGPU )
 
diff --git a/Generators/Epos_i/CMakeLists.txt b/Generators/Epos_i/CMakeLists.txt
index f18cf600e863880d323421c041877d3ae1e43d9f..465cf964194cbc3dcda58f121e275900c61e2772 100644
--- a/Generators/Epos_i/CMakeLists.txt
+++ b/Generators/Epos_i/CMakeLists.txt
@@ -1,8 +1,5 @@
 # Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
 
-# Minimum CMake requirement for the package.
-cmake_minimum_required( VERSION 3.21 )
-
 # Declare the package name:
 atlas_subdir( Epos_i )
 
diff --git a/Projects/AnalysisBase/CMakeLists.txt b/Projects/AnalysisBase/CMakeLists.txt
index 27da404a40d868a9cc03769cffa2d27eb614b6a7..49691e76aca07f8c37eed4e306de3a8365154824 100644
--- a/Projects/AnalysisBase/CMakeLists.txt
+++ b/Projects/AnalysisBase/CMakeLists.txt
@@ -5,7 +5,7 @@
 #
 
 # Set up the project.
-cmake_minimum_required( VERSION 3.6 )
+cmake_minimum_required( VERSION 3.25 )
 file( READ ${CMAKE_SOURCE_DIR}/version.txt _version )
 string( STRIP ${_version} _version )
 project( AnalysisBase VERSION ${_version} LANGUAGES C CXX )
diff --git a/Projects/AthAnalysis/CMakeLists.txt b/Projects/AthAnalysis/CMakeLists.txt
index a691873d021d45ed301e1fae7d9d915b8b8975c6..5eb959a7f76ee000f91598b5cf3b6cc3d7bf0b42 100644
--- a/Projects/AthAnalysis/CMakeLists.txt
+++ b/Projects/AthAnalysis/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
 
 # Set up the project.
-cmake_minimum_required( VERSION 3.6 )
+cmake_minimum_required( VERSION 3.25 )
 file( READ ${CMAKE_SOURCE_DIR}/version.txt _version )
 string( STRIP ${_version} _version )
 project( AthAnalysis VERSION ${_version} LANGUAGES C CXX Fortran )
diff --git a/Projects/AthGeneration/CMakeLists.txt b/Projects/AthGeneration/CMakeLists.txt
index 44f681c3c2718a2d6f9e6a2f3ad38df75b3c1a6c..fb60f0e47eadaeb0dc984e6362b9d082209ccbac 100644
--- a/Projects/AthGeneration/CMakeLists.txt
+++ b/Projects/AthGeneration/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 
 # Set up the project.
-cmake_minimum_required( VERSION 3.6 )
+cmake_minimum_required( VERSION 3.25 )
 file( READ ${CMAKE_SOURCE_DIR}/version.txt _version )
 string( STRIP ${_version} _version )
 project( AthGeneration VERSION ${_version} LANGUAGES C CXX Fortran )
diff --git a/Projects/AthSimulation/CMakeLists.txt b/Projects/AthSimulation/CMakeLists.txt
index 734302379272f1cb50fa61f9aab6faa36888014d..3381ce88eae2b672203f41773fd7eca2c05f0ea5 100644
--- a/Projects/AthSimulation/CMakeLists.txt
+++ b/Projects/AthSimulation/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 
 # Set up the project.
-cmake_minimum_required( VERSION 3.10 )
+cmake_minimum_required( VERSION 3.25 )
 file( READ ${CMAKE_SOURCE_DIR}/version.txt _version )
 string( STRIP ${_version} _version )
 project( AthSimulation VERSION ${_version} LANGUAGES C CXX Fortran )
diff --git a/Projects/Athena/CMakeLists.txt b/Projects/Athena/CMakeLists.txt
index 22fc57b6bb4c35511b50ee59e21dc99a84b4208d..8a3c95b3b0c70ea22f4869a8e5da3e91a00ab7cc 100644
--- a/Projects/Athena/CMakeLists.txt
+++ b/Projects/Athena/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 
 # Set up the project.
-cmake_minimum_required( VERSION 3.10 )
+cmake_minimum_required( VERSION 3.25 )
 file( READ ${CMAKE_SOURCE_DIR}/version.txt _version )
 string( STRIP ${_version} _version )
 project( Athena VERSION ${_version} LANGUAGES C CXX Fortran )
diff --git a/Projects/DetCommon/CMakeLists.txt b/Projects/DetCommon/CMakeLists.txt
index 7032d270586b5f7db5a25ab412f3f1f3f77b9b94..faeee8c33eee28d786cbaa7ef96e5e6c384cc22b 100644
--- a/Projects/DetCommon/CMakeLists.txt
+++ b/Projects/DetCommon/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
 
 # Set up the project.
-cmake_minimum_required( VERSION 3.10 )
+cmake_minimum_required( VERSION 3.25 )
 file( READ ${CMAKE_SOURCE_DIR}/version.txt _version )
 string( STRIP ${_version} _version )
 project( DetCommon VERSION ${_version} LANGUAGES C CXX )
diff --git a/Projects/VP1Light/CMakeLists.txt b/Projects/VP1Light/CMakeLists.txt
index e4afa182f05f5dce83caadfcf6f2058cc0af42e4..12c367383c8ca1dbf5a4fe67358fd6f1e94855d2 100644
--- a/Projects/VP1Light/CMakeLists.txt
+++ b/Projects/VP1Light/CMakeLists.txt
@@ -5,7 +5,7 @@
 #
 
 # Set up the project.
-cmake_minimum_required( VERSION 3.6 )
+cmake_minimum_required( VERSION 3.25 )
 file( READ ${CMAKE_SOURCE_DIR}/version.txt _version )
 string( STRIP ${_version} _version )
 project( VP1Light VERSION ${_version} LANGUAGES C CXX )
diff --git a/Projects/WorkDir/CMakeLists.txt b/Projects/WorkDir/CMakeLists.txt
index b5f8256a281200d9f18216dbaa77b17e56794237..e4e4cf5add67c930671f643941a1353e693a0ede 100644
--- a/Projects/WorkDir/CMakeLists.txt
+++ b/Projects/WorkDir/CMakeLists.txt
@@ -5,7 +5,7 @@
 #
 
 # Set up the project.
-cmake_minimum_required( VERSION 3.10 )
+cmake_minimum_required( VERSION 3.25 )
 # Note that there is a second `project` call further below to set
 # the version and languages.
 project( WorkDir )