diff --git a/pyproject.toml b/pyproject.toml
index 58e94596..ec117689 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,2 +1,2 @@
 [build-system]
-requires=['setuptools>=60.0', 'numpy~=1.24', 'cykhash>=2.0,<3.0', 'Cython~=3.0', 'hmmlearn>=0.3']
+requires=['setuptools>=60.0', 'numpy==1.24', 'cykhash>=2.0,<3.0', 'Cython~=3.0', 'hmmlearn>=0.3']
diff --git a/requirements.txt b/requirements.txt
index 2cdd13e1..3417eb78 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 Cython~=3.0
-numpy~=1.24
+numpy==1.24
 hmmlearn>=0.3
 cykhash>=2.0,<3.0 
 pytest>=7.0
diff --git a/setup.py b/setup.py
index 53aee903..288d31a1 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@
               'Programming Language :: Python :: 3.12',
               'Programming Language :: Cython', ]
 
-install_requires = [ "numpy~=1.24",
+install_requires = [ "numpy==1.24",
                      "hmmlearn>=0.3",
                      "cykhash>=2.0,<3.0"]