diff --git a/README.md b/README.md
index dad0363..d42c784 100644
--- a/README.md
+++ b/README.md
@@ -20,4 +20,8 @@ Please, read the [contributing guidelines](CONTRIBUTING.md) before contributing
 
 ## License
 
-This project is licensed under the GPL-3.0 License. See the [LICENSE](LICENSE) file for details.
\ No newline at end of file
+This project is licensed under the GPL-3.0 License. See the [LICENSE](LICENSE) file for details.
+
+---
+
+_NREL Software Record number: SWR-24-57_
\ No newline at end of file
diff --git a/blackboxopt/__init__.py b/blackboxopt/__init__.py
index 2354a0d..3486224 100644
--- a/blackboxopt/__init__.py
+++ b/blackboxopt/__init__.py
@@ -16,7 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 __all__ = ["acquisition", "optimize", "sampling", "rbf"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 
 from . import acquisition
 from . import optimize
diff --git a/blackboxopt/acquisition.py b/blackboxopt/acquisition.py
index df1f39f..72eb849 100644
--- a/blackboxopt/acquisition.py
+++ b/blackboxopt/acquisition.py
@@ -31,7 +31,7 @@
     "Haoyu Jia",
     "Weslley S. Pereira",
 ]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import numpy as np
diff --git a/blackboxopt/optimize.py b/blackboxopt/optimize.py
index 5fda7cc..eda6da2 100644
--- a/blackboxopt/optimize.py
+++ b/blackboxopt/optimize.py
@@ -31,7 +31,7 @@
     "Haoyu Jia",
     "Weslley S. Pereira",
 ]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 from typing import Callable, Optional, Union
diff --git a/blackboxopt/problem.py b/blackboxopt/problem.py
index 7af2c16..1b2bb7a 100644
--- a/blackboxopt/problem.py
+++ b/blackboxopt/problem.py
@@ -20,7 +20,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import numpy as np
diff --git a/blackboxopt/rbf.py b/blackboxopt/rbf.py
index 3b0c3d3..870e39d 100644
--- a/blackboxopt/rbf.py
+++ b/blackboxopt/rbf.py
@@ -20,7 +20,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 from typing import Optional
diff --git a/blackboxopt/sampling.py b/blackboxopt/sampling.py
index 4cf7088..e0119e5 100644
--- a/blackboxopt/sampling.py
+++ b/blackboxopt/sampling.py
@@ -31,7 +31,7 @@
     "Haoyu Jia",
     "Weslley S. Pereira",
 ]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import numpy as np
diff --git a/docs/conf.py b/docs/conf.py
index 346e96f..217d431 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -15,9 +15,9 @@
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
 project = "Black-box Opt"
-copyright = "2024, National Renewable Energy Laboratory"
+copyright = "2024, Alliance for Sustainable Energy, LLC"
 author = "Weslley S. Pereira"
-release = "0.3.3"
+release = "0.4.0"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
diff --git a/examples/multiobj/pareto_front.ipynb b/examples/multiobj/pareto_front.ipynb
index 31996ab..2a8cbf0 100644
--- a/examples/multiobj/pareto_front.ipynb
+++ b/examples/multiobj/pareto_front.ipynb
@@ -29,7 +29,7 @@
     "__maintainer__ = \"Weslley S. Pereira\"\n",
     "__email__ = \"weslley.dasilvapereira@nrel.gov\"\n",
     "__credits__ = [\"Weslley S. Pereira\"]\n",
-    "__version__ = \"0.3.3\"\n",
+    "__version__ = \"0.4.0\"\n",
     "__deprecated__ = False"
    ]
   },
diff --git a/examples/multiobj/socemo.ipynb b/examples/multiobj/socemo.ipynb
index 60a7e2a..f474c40 100644
--- a/examples/multiobj/socemo.ipynb
+++ b/examples/multiobj/socemo.ipynb
@@ -28,7 +28,7 @@
     "__maintainer__ = \"Weslley S. Pereira\"\n",
     "__email__ = \"weslley.dasilvapereira@nrel.gov\"\n",
     "__credits__ = [\"Weslley S. Pereira\"]\n",
-    "__version__ = \"0.3.3\"\n",
+    "__version__ = \"0.4.0\"\n",
     "__deprecated__ = False"
    ]
   },
diff --git a/examples/opt_with_constr/example_gosac_1.py b/examples/opt_with_constr/example_gosac_1.py
index 44058cf..6b4d9fc 100644
--- a/examples/opt_with_constr/example_gosac_1.py
+++ b/examples/opt_with_constr/example_gosac_1.py
@@ -20,7 +20,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Juliane Mueller", "Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 from blackboxopt.optimize import gosac
diff --git a/examples/opt_with_constr/example_gosac_2.py b/examples/opt_with_constr/example_gosac_2.py
index d885af9..22ae1f6 100644
--- a/examples/opt_with_constr/example_gosac_2.py
+++ b/examples/opt_with_constr/example_gosac_2.py
@@ -20,7 +20,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Juliane Mueller", "Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 from blackboxopt.optimize import gosac
diff --git a/examples/sampling.ipynb b/examples/sampling.ipynb
index ad517c6..f954138 100644
--- a/examples/sampling.ipynb
+++ b/examples/sampling.ipynb
@@ -8,7 +8,7 @@
    "source": [
     "\"\"\"Example showing different sampling strategies\"\"\"\n",
     "\n",
-    "# Copyright (C) 2024 National Renewable Energy Laboratory\n",
+    "# Copyright (c) 2024 Alliance for Sustainable Energy, LLC\n",
     "\n",
     "# This program is free software: you can redistribute it and/or modify\n",
     "# it under the terms of the GNU General Public License as published by\n",
@@ -28,7 +28,7 @@
     "__maintainer__ = \"Weslley S. Pereira\"\n",
     "__email__ = \"weslley.dasilvapereira@nrel.gov\"\n",
     "__credits__ = [\"Weslley S. Pereira\"]\n",
-    "__version__ = \"0.3.3\"\n",
+    "__version__ = \"0.4.0\"\n",
     "__deprecated__ = False"
    ]
   },
diff --git a/examples/single_obj_rbf/LocalStochRBFstop.py b/examples/single_obj_rbf/LocalStochRBFstop.py
index 438914e..d6d3fde 100644
--- a/examples/single_obj_rbf/LocalStochRBFstop.py
+++ b/examples/single_obj_rbf/LocalStochRBFstop.py
@@ -26,7 +26,7 @@
     "Haoyu Jia",
     "Weslley S. Pereira",
 ]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 from optprogram1 import read_check_data_file
diff --git a/examples/single_obj_rbf/compareLearningStrategies.py b/examples/single_obj_rbf/compareLearningStrategies.py
index ad56558..7177b69 100644
--- a/examples/single_obj_rbf/compareLearningStrategies.py
+++ b/examples/single_obj_rbf/compareLearningStrategies.py
@@ -20,7 +20,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 
diff --git a/examples/single_obj_rbf/data.py b/examples/single_obj_rbf/data.py
index a707a82..6da3f00 100644
--- a/examples/single_obj_rbf/data.py
+++ b/examples/single_obj_rbf/data.py
@@ -26,7 +26,7 @@
     "Haoyu Jia",
     "Weslley S. Pereira",
 ]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 from dataclasses import dataclass
diff --git a/examples/single_obj_rbf/datainput_Branin.py b/examples/single_obj_rbf/datainput_Branin.py
index 52465f7..5ad5bf4 100644
--- a/examples/single_obj_rbf/datainput_Branin.py
+++ b/examples/single_obj_rbf/datainput_Branin.py
@@ -26,7 +26,7 @@
     "Haoyu Jia",
     "Weslley S. Pereira",
 ]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import numpy as np
diff --git a/examples/single_obj_rbf/datainput_BraninWithInteger.py b/examples/single_obj_rbf/datainput_BraninWithInteger.py
index a8e9566..0eec731 100644
--- a/examples/single_obj_rbf/datainput_BraninWithInteger.py
+++ b/examples/single_obj_rbf/datainput_BraninWithInteger.py
@@ -26,7 +26,7 @@
     "Haoyu Jia",
     "Weslley S. Pereira",
 ]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import numpy as np
diff --git a/examples/single_obj_rbf/datainput_hartman3.py b/examples/single_obj_rbf/datainput_hartman3.py
index bcfbd69..d2c810c 100644
--- a/examples/single_obj_rbf/datainput_hartman3.py
+++ b/examples/single_obj_rbf/datainput_hartman3.py
@@ -26,7 +26,7 @@
     "Haoyu Jia",
     "Weslley S. Pereira",
 ]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import numpy as np
diff --git a/examples/single_obj_rbf/datainput_rastrigin.py b/examples/single_obj_rbf/datainput_rastrigin.py
index d412a77..2757e68 100644
--- a/examples/single_obj_rbf/datainput_rastrigin.py
+++ b/examples/single_obj_rbf/datainput_rastrigin.py
@@ -26,7 +26,7 @@
     "Haoyu Jia",
     "Weslley S. Pereira",
 ]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import numpy as np
diff --git a/examples/single_obj_rbf/optprogram1.py b/examples/single_obj_rbf/optprogram1.py
index f4cff76..3bfa7a9 100644
--- a/examples/single_obj_rbf/optprogram1.py
+++ b/examples/single_obj_rbf/optprogram1.py
@@ -31,7 +31,7 @@
     "Haoyu Jia",
     "Weslley S. Pereira",
 ]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 
diff --git a/examples/vlse_benchmark/vlse_bench.ipynb b/examples/vlse_benchmark/vlse_bench.ipynb
index 079a243..5691833 100644
--- a/examples/vlse_benchmark/vlse_bench.ipynb
+++ b/examples/vlse_benchmark/vlse_bench.ipynb
@@ -28,7 +28,7 @@
     "__maintainer__ = \"Weslley S. Pereira\"\n",
     "__email__ = \"weslley.dasilvapereira@nrel.gov\"\n",
     "__credits__ = [\"Weslley S. Pereira\"]\n",
-    "__version__ = \"0.3.3\"\n",
+    "__version__ = \"0.4.0\"\n",
     "__deprecated__ = False"
    ]
   },
diff --git a/examples/vlse_benchmark/vlse_bench.py b/examples/vlse_benchmark/vlse_bench.py
index 4975164..ed5393b 100644
--- a/examples/vlse_benchmark/vlse_bench.py
+++ b/examples/vlse_benchmark/vlse_bench.py
@@ -20,7 +20,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import os
diff --git a/pyproject.toml b/pyproject.toml
index a1eeebb..e46b238 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "blackboxopt"
-version = "0.3.3"
+version = "0.4.0"
 description = "Surrogate models and active learning for scientific applications"
 authors = [
     {name = "Weslley da Silva Pereira", email = "weslley.dasilvapereira@nrel.gov"},
diff --git a/tests/test_optimize.py b/tests/test_optimize.py
index 25cf5db..1e44cae 100644
--- a/tests/test_optimize.py
+++ b/tests/test_optimize.py
@@ -20,7 +20,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import numpy as np
diff --git a/tests/test_rbf.py b/tests/test_rbf.py
index 4a29c7e..1598080 100644
--- a/tests/test_rbf.py
+++ b/tests/test_rbf.py
@@ -20,7 +20,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import numpy as np
diff --git a/tests/test_sampling.py b/tests/test_sampling.py
index 5396232..dc84d25 100644
--- a/tests/test_sampling.py
+++ b/tests/test_sampling.py
@@ -20,7 +20,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 import numpy as np
diff --git a/tests/test_vlse_bench.py b/tests/test_vlse_bench.py
index e759ba6..0ea3693 100644
--- a/tests/test_vlse_bench.py
+++ b/tests/test_vlse_bench.py
@@ -20,7 +20,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 from copy import deepcopy
diff --git a/tests/vlse_benchmark/__init__.py b/tests/vlse_benchmark/__init__.py
index 733d72c..e7910b1 100644
--- a/tests/vlse_benchmark/__init__.py
+++ b/tests/vlse_benchmark/__init__.py
@@ -27,7 +27,7 @@
 __maintainer__ = "Weslley S. Pereira"
 __email__ = "weslley.dasilvapereira@nrel.gov"
 __credits__ = ["Sonja Surjanovic", "Derek Bingham", "Weslley S. Pereira"]
-__version__ = "0.3.3"
+__version__ = "0.4.0"
 __deprecated__ = False
 
 from rpy2.robjects import r