diff --git a/pyproject.toml b/pyproject.toml
index 3873449d..b40fd1c8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ authors = [
 ]
 license = {text = "MIT"}
 readme = "README.md"
-requires-python = ">=3.8,<=3.11"
+requires-python = ">=3.8,<3.12"
 dynamic = ["version"]
 
 keywords = ["pdes", "partial-differential-equations", "dynamical-systems"]
diff --git a/scripts/_templates/pyproject.toml b/scripts/_templates/pyproject.toml
index 54df9fed..31666426 100644
--- a/scripts/_templates/pyproject.toml
+++ b/scripts/_templates/pyproject.toml
@@ -6,7 +6,7 @@ authors = [
 ]
 license = {text = "MIT"}
 readme = "README.md"
-requires-python = ">=$MIN_PYTHON_VERSION,<=$MAX_PYTHON_VERSION"
+requires-python = ">=$MIN_PYTHON_VERSION,<$MAX_PYTHON_VERSION_NEXT"
 dynamic = ["version"]
 
 keywords = ["pdes", "partial-differential-equations", "dynamical-systems"]
diff --git a/scripts/create_requirements.py b/scripts/create_requirements.py
index f239bdea..d497e7ac 100755
--- a/scripts/create_requirements.py
+++ b/scripts/create_requirements.py
@@ -270,11 +270,16 @@ def write_from_template(
     with template_path.open("r") as fp:
         template = Template(fp.read())
 
+    # parse python version
+    major, minor = MAX_PYTHON_VERSION.split(".")
+    minor_next = int(minor) + 1
+
     # determine template substitutes
     substitutes = {
         "MIN_PYTHON_VERSION": MIN_PYTHON_VERSION,
         "MIN_PYTHON_VERSION_NODOT": MIN_PYTHON_VERSION.replace(".", ""),
         "MAX_PYTHON_VERSION": MAX_PYTHON_VERSION,
+        "MAX_PYTHON_VERSION_NEXT": f"{major}.{minor_next}",
     }
     if requirements:
         req_list = (
diff --git a/tests/requirements.txt b/tests/requirements.txt
index 656d0d41..8961b6a6 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -4,7 +4,6 @@ importlib-metadata>=5
 isort>=5.1
 jupyter_contrib_nbextensions>=0.5
 mypy>=0.770
-nbconvert>=5
 pyinstrument>=3
 pytest>=5.4
 pytest-cov>=2.8