diff --git a/packages/data-designer-engine/pyproject.toml b/packages/data-designer-engine/pyproject.toml
index ed59c8421..f38b25d78 100644
--- a/packages/data-designer-engine/pyproject.toml
+++ b/packages/data-designer-engine/pyproject.toml
@@ -54,6 +54,7 @@ dependencies = [
     "networkx>=3.0,<4",
     "numpy>=1.23.5,<3",
     "pandas>=2.3.3,<3",
+    "pyarrow>=22,<23", # Required for parquet I/O operations; 22 is the first release with Python 3.14 wheels
     "pydantic>=2.9.2,<3",
     "pyjwt[crypto]>=2.13.0,<3", # 2.13.0 fixes PyJWT security advisories pulled in by mcp
     "python-multipart>=0.0.32,<1", # 0.0.32 addresses multipart security advisories pulled in by mcp
diff --git a/uv.lock b/uv.lock
index 61b6bdfa7..8e00ea924 100644
--- a/uv.lock
+++ b/uv.lock
@@ -886,6 +886,7 @@ dependencies = [
     { name = "numpy", version = "2.2.6", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.11'" },
     { name = "numpy", version = "2.4.3", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.11'" },
     { name = "pandas" },
+    { name = "pyarrow" },
     { name = "pydantic" },
     { name = "pyjwt", extra = ["crypto"] },
     { name = "python-multipart" },
@@ -920,6 +921,7 @@ requires-dist = [
     { name = "networkx", specifier = ">=3.0,<4" },
     { name = "numpy", specifier = ">=1.23.5,<3" },
     { name = "pandas", specifier = ">=2.3.3,<3" },
+    { name = "pyarrow", specifier = ">=22,<23" },
     { name = "pydantic", specifier = ">=2.9.2,<3" },
     { name = "pyjwt", extras = ["crypto"], specifier = ">=2.13.0,<3" },
     { name = "python-multipart", specifier = ">=0.0.32,<1" },