diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0e3fbf6..57d631c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,7 +51,7 @@ jobs:
             numpy-version: "latest"
             runs-on: ubuntu-latest
           - python-version: "3.9"
-            numpy-version: "1.22.0"
+            numpy-version: "1.24.0"
             runs-on: ubuntu-latest
 
     steps:
diff --git a/pyproject.toml b/pyproject.toml
index b566795..0cf7895 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,6 +31,7 @@ classifiers = [
 dynamic = ["version"]
 dependencies = [
   "awkward>=2.6.7",
+  "numpy>=1.24.0",
 ]
 
 [project.optional-dependencies]