diff --git a/conda/environments/all_cuda-118_arch-x86_64.yaml b/conda/environments/all_cuda-118_arch-x86_64.yaml
index e13357aa78e..cf363a819a2 100644
--- a/conda/environments/all_cuda-118_arch-x86_64.yaml
+++ b/conda/environments/all_cuda-118_arch-x86_64.yaml
@@ -58,7 +58,7 @@ dependencies:
 - ninja
 - notebook
 - numba>=0.57
-- numpy>=1.23
+- numpy>=1.23,<2.0a0
 - numpydoc
 - nvcc_linux-64=11.8
 - nvcomp==3.0.6
diff --git a/conda/environments/all_cuda-122_arch-x86_64.yaml b/conda/environments/all_cuda-122_arch-x86_64.yaml
index c028c3fde3a..42460532b1b 100644
--- a/conda/environments/all_cuda-122_arch-x86_64.yaml
+++ b/conda/environments/all_cuda-122_arch-x86_64.yaml
@@ -57,7 +57,7 @@ dependencies:
 - ninja
 - notebook
 - numba>=0.57
-- numpy>=1.23
+- numpy>=1.23,<2.0a0
 - numpydoc
 - nvcomp==3.0.6
 - nvtx>=0.2.1
diff --git a/dependencies.yaml b/dependencies.yaml
index 37dfb933451..db0a766df82 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -503,7 +503,7 @@ dependencies:
       - output_types: [conda, requirements, pyproject]
         packages:
           - fsspec>=0.6.0
-          - numpy>=1.23
+          - numpy>=1.23,<2.0a0
           - pandas>=2.0,<2.2.2dev0
   run_cudf:
     common:
diff --git a/python/cudf/pyproject.toml b/python/cudf/pyproject.toml
index cbe9e1a9f24..da574fdb031 100644
--- a/python/cudf/pyproject.toml
+++ b/python/cudf/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = [
     "cupy-cuda11x>=12.0.0",
     "fsspec>=0.6.0",
     "numba>=0.57",
-    "numpy>=1.23",
+    "numpy>=1.23,<2.0a0",
     "nvtx>=0.2.1",
     "packaging",
     "pandas>=2.0,<2.2.2dev0",
diff --git a/python/dask_cudf/pyproject.toml b/python/dask_cudf/pyproject.toml
index 21aaa17a6c7..b55bb9d3eaf 100644
--- a/python/dask_cudf/pyproject.toml
+++ b/python/dask_cudf/pyproject.toml
@@ -21,7 +21,7 @@ dependencies = [
     "cudf==24.4.*",
     "cupy-cuda11x>=12.0.0",
     "fsspec>=0.6.0",
-    "numpy>=1.23",
+    "numpy>=1.23,<2.0a0",
     "pandas>=2.0,<2.2.2dev0",
     "rapids-dask-dependency==24.4.*",
 ] # This list was generated by `rapids-dependency-file-generator`. To make changes, edit ../../dependencies.yaml and run `rapids-dependency-file-generator`.