diff --git a/Manifest.toml b/Manifest.toml
new file mode 100644
index 0000000..6f82162
--- /dev/null
+++ b/Manifest.toml
@@ -0,0 +1,4 @@
+# Pin jll version
+[[finufft_jll]]
+uuid = "c41cd5a2-72a3-5203-9076-a500b088fc82"
+version = "2.2.0+0"