diff --git a/.gitmodules b/.gitmodules
index ea95418682183..2cd0b54bdd46c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "lib/chiapos"]
 	path = lib/chiapos
 	url = git@github.com:Chia-Network/proof-of-space.git
+[submodule "lib/bip158/lib/pybind11"]
+	path = lib/bip158/lib/pybind11
+	url = https://github.com/pybind/pybind11.git
diff --git a/lib/bip158/lib/pybind11 b/lib/bip158/lib/pybind11
new file mode 160000
index 0000000000000..c9d32a81f40ad
--- /dev/null
+++ b/lib/bip158/lib/pybind11
@@ -0,0 +1 @@
+Subproject commit c9d32a81f40ad540015814edf13b29980c63e39c