diff --git a/docs/changelog.md b/docs/changelog.md
index 0d6d5b03d9ca354a2df6a785ac50b53b0c7e5a47..c7d3a6a51cd91607c778913fe03f2e8870a43869 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -2,6 +2,7 @@
 
 ## v3.0.2 (06-7-2026)
 - Fix installation issues for macOS users with a silicon chip.
+- Add pydantic to project dependencies
 
 ## v3.0.1 (06-7-2026)
 - Added pressureDifferenceGradient as property.
diff --git a/pyproject.toml b/pyproject.toml
index b91aa8678b22cf20cb252a9f09f16d577117fbe6..cac1b362bd7aeeefe2031f1f0729d1d3116c322a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,6 +22,7 @@ dependencies = [
     "pygridsio>=1.0,<2.0",
     "dask>=2025.5.1,<2026",
     "install-jdk==1.1.0",
+    "pydantic>=2.12.5,<3",
 ]