diff --git a/pyproject.toml b/pyproject.toml
index a9b6b80..f876498 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=70.1"]
+requires = ["setuptools>=84.0.0"]
 build-backend = "setuptools.build_meta"
 
 [tool.ruff]
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 82d82d4..9c1e6dc 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -9,6 +9,6 @@
 -r requirements.txt
 
 pytest>=9.1.1        # test runner (pytest.ini → testpaths=tests)
-ruff>=0.16.5          # lint gate (config in pyproject.toml [tool.ruff.lint])
+ruff>=0.16.10          # lint gate (config in pyproject.toml [tool.ruff.lint])
 pip-audit>=2.10.1     # dependency vulnerability scan (see README "Dependency security")
-build>=1.6.0         # sdist/wheel build used by the publish workflow
+build>=1.6.1         # sdist/wheel build used by the publish workflow
diff --git a/requirements.txt b/requirements.txt
index 0059e69..1fede39 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 numpy>=2.4.6
-cryptography>=50.0.1
+cryptography>=50.0.2
 libnacl>=2.1.0
 base58>=2.1.1
 aiohttp>=3.14.3
-cffi>=2.0.0; platform_python_implementation != "PyPy"
+cffi>=2.1.1; platform_python_implementation != "PyPy"