diff --git a/doc/source/conf.py b/doc/source/conf.py
index 934cdb0b789..5f06bd51eaa 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -70,7 +70,7 @@
 # The short X.Y version.
 version = "4.3"
 # The full version, including alpha/beta/rc tags.
-release = "4.3-dev"
+release = "4.3.0"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/pyproject.toml b/pyproject.toml
index e1f2fd3ac47..521635bd1f3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ build-backend = "setuptools.build_meta:__legacy__"
 
 [project]
 name = "yt"
-version = "4.3.dev0"
+version = "4.3.0"
 description = "An analysis and visualization toolkit for volumetric data"
 authors = [
     { name = "The yt project", email = "yt-dev@python.org" },
@@ -48,7 +48,7 @@ dependencies = [
     "ipywidgets>=8.0.0",
     "matplotlib>=3.5",
     "more-itertools>=8.4",
-    "numpy>=1.19.3", # keep minimal requirement in sync with NPY_TARGET_VERSION
+    "numpy>=1.19.3, <2", # keep minimal requirement in sync with NPY_TARGET_VERSION
     "packaging>=20.9",
     "pillow>=8.0.0",
     "tomli-w>=0.4.0",
diff --git a/yt/_version.py b/yt/_version.py
index ab11ac90727..d6e27d8774e 100644
--- a/yt/_version.py
+++ b/yt/_version.py
@@ -7,7 +7,7 @@
     "version_info",
 ]
 
-__version__ = "4.3.dev0"  # keep in sync with pyproject.toml
+__version__ = "4.3.0"  # keep in sync with pyproject.toml
 
 
 class VersionTuple(NamedTuple):