diff --git a/README.rst b/README.rst
index 5675b771b7..29014cfe3d 100644
--- a/README.rst
+++ b/README.rst
@@ -94,7 +94,7 @@ possible.
 Development Site
 ================
 
-The current development version is 3.0.0a5. The current stable version is
+The current development version is 3.0.0b1. The current stable version is
 2.6.0. The `latest Cantera source code <https://github.com/Cantera/cantera>`_,
 the `issue tracker <https://github.com/Cantera/cantera/issues>`_ for bugs and
 enhancement requests, `downloads of Cantera releases and binary installers
diff --git a/SConstruct b/SConstruct
index 893b34757d..6c813b76f1 100644
--- a/SConstruct
+++ b/SConstruct
@@ -947,7 +947,7 @@ for arg in ARGUMENTS:
         logger.error(f"Encountered unexpected command line option: {arg!r}")
         sys.exit(1)
 
-env["cantera_version"] = "3.0.0a5"
+env["cantera_version"] = "3.0.0b1"
 # For use where pre-release tags are not permitted (MSI, sonames)
 env['cantera_pure_version'] = re.match(r'(\d+\.\d+\.\d+)', env['cantera_version']).group(0)
 env['cantera_short_version'] = re.match(r'(\d+\.\d+)', env['cantera_version']).group(0)
diff --git a/doc/doxygen/Doxyfile b/doc/doxygen/Doxyfile
index c3188cdaea..bbc362224e 100644
--- a/doc/doxygen/Doxyfile
+++ b/doc/doxygen/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = Cantera
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 3.0.0a5
+PROJECT_NUMBER         = 3.0.0b1
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/interfaces/cython/cantera/ck2yaml.py b/interfaces/cython/cantera/ck2yaml.py
index 986b46bb54..13b8e124e7 100644
--- a/interfaces/cython/cantera/ck2yaml.py
+++ b/interfaces/cython/cantera/ck2yaml.py
@@ -1947,7 +1947,7 @@ def write_yaml(self, name='gas', out_name='mech.yaml'):
             metadata = BlockMap([
                 ("generator", "ck2yaml"),
                 ("input-files", FlowList(files)),
-                ("cantera-version", "3.0.0a5"),
+                ("cantera-version", "3.0.0b1"),
                 ("date", formatdate(localtime=True)),
             ])
             if desc.strip():
diff --git a/interfaces/cython/cantera/cti2yaml.py b/interfaces/cython/cantera/cti2yaml.py
index ee9a8f946b..de6b45a49f 100644
--- a/interfaces/cython/cantera/cti2yaml.py
+++ b/interfaces/cython/cantera/cti2yaml.py
@@ -1661,7 +1661,7 @@ def convert(filename=None, output_name=None, text=None, encoding="latin-1"):
         # information regarding conversion
         metadata = BlockMap([
             ("generator", "cti2yaml"),
-            ("cantera-version", "3.0.0a5"),
+            ("cantera-version", "3.0.0b1"),
             ("date", formatdate(localtime=True)),
         ])
         if filename != "<string>":
diff --git a/interfaces/cython/cantera/ctml2yaml.py b/interfaces/cython/cantera/ctml2yaml.py
index 26d34d88b4..75fd08fa1b 100644
--- a/interfaces/cython/cantera/ctml2yaml.py
+++ b/interfaces/cython/cantera/ctml2yaml.py
@@ -2638,7 +2638,7 @@ def convert(
     metadata = BlockMap(
         {
             "generator": "ctml2yaml",
-            "cantera-version": "3.0.0a5",
+            "cantera-version": "b1",
             "date": formatdate(localtime=True),
         }
     )