diff --git a/Source/FaustBoxAPI.cpp b/Source/FaustBoxAPI.cpp
index cb68fbb0..d5fec173 100644
--- a/Source/FaustBoxAPI.cpp
+++ b/Source/FaustBoxAPI.cpp
@@ -479,6 +479,14 @@ py::module_ &create_bindings_for_faust_box(py::module &faust_module,
             return BoxWrapper(boxFVar(type, name, file));
           },
           arg("type"), arg("name"), arg("file"))
+      .def(
+          "boxFFun",
+          [](SType type, nvec names, svec atypes, const std::string &incfile,
+             const std::string &libfile) {
+            return BoxWrapper(boxFFun(type, names, atypes, incfile, libfile));
+          },
+          arg("type"), arg("names"), arg("arg_types"), arg("inc_file"),
+          arg("lib_file"), "Return a foreign function box.")
 
       .def(
           "boxBinOp",
@@ -837,7 +845,7 @@ py::module_ &create_bindings_for_faust_box(py::module &faust_module,
       .def(
           "boxVGroup",
           [](std::string &label, BoxWrapper &box1) {
-            return BoxWrapper(boxHGroup(label, box1));
+            return BoxWrapper(boxVGroup(label, box1));
           },
           arg("label"), arg("box"), "Create a vgroup.")
 
@@ -872,7 +880,6 @@ py::module_ &create_bindings_for_faust_box(py::module &faust_module,
                                   : boxAttach());
           },
           arg("box1") = py::none(), arg("box2") = py::none())
-
       .def(
           "boxSampleRate",
           []() {
diff --git a/Source/FaustSignalAPI.cpp b/Source/FaustSignalAPI.cpp
index 509db1ee..6fccb55d 100644
--- a/Source/FaustSignalAPI.cpp
+++ b/Source/FaustSignalAPI.cpp
@@ -189,9 +189,7 @@ void create_bindings_for_faust_signal(py::module &faust_module,
           arg("sig1"), arg("sig2"))
       .def(
           "sigDelay1",
-          [](SigWrapper &sig1) {
-            return SigWrapper(sigDelay1(sig1));
-          },
+          [](SigWrapper &sig1) { return SigWrapper(sigDelay1(sig1)); },
           arg("sig1"))
 
       .def(
@@ -272,12 +270,22 @@ void create_bindings_for_faust_signal(py::module &faust_module,
           },
           arg("selector"), arg("sig1"), arg("sig2"), arg("sig3"))
 
+      .def(
+          "sigFFun",
+          [](SType rtype, nvec names, svec atypes, const std::string &incfile,
+             const std::string &libfile, tvec largs) {
+            return SigWrapper(
+                sigFFun(rtype, names, atypes, incfile, libfile, largs));
+          },
+          arg("type"), arg("names"), arg("arg_types"), arg("inc_file"),
+          arg("lib_file"), arg("largs"), "Create a foreign function signal.")
       .def(
           "sigFConst",
           [](SType type, const std::string &name, const std::string &file) {
             return SigWrapper(sigFConst(type, name, file));
           },
-          arg("type"), arg("name"), arg("file"))
+          arg("type"), arg("name"), arg("file"),
+          "Create a foreign constant signal.")
       .def(
           "sigFVar",
           [](SType type, const std::string &name, const std::string &file) {
diff --git a/thirdparty/faust b/thirdparty/faust
index 5341a623..35f909c3 160000
--- a/thirdparty/faust
+++ b/thirdparty/faust
@@ -1 +1 @@
-Subproject commit 5341a623b04420089318e967153eaf7bef49aa5c
+Subproject commit 35f909c3a32267a9ae960d53931a85245e40ba4a
diff --git a/thirdparty/libfaust/download_libfaust.py b/thirdparty/libfaust/download_libfaust.py
index 4415ace2..4381a0a2 100644
--- a/thirdparty/libfaust/download_libfaust.py
+++ b/thirdparty/libfaust/download_libfaust.py
@@ -58,7 +58,7 @@ def main(version: str) -> None:
         sys.exit("Python %s.%s or later is required.\n" % MIN_PYTHON)
 
     parser = argparse.ArgumentParser(description="Download and install Libfaust.")
-    parser.add_argument("-v", "--version", default="2.69.3", help="Specify the version of Faust to download.")
+    parser.add_argument("-v", "--version", default="2.70.3", help="Specify the version of Faust to download.")
     parser.add_argument("--force", action="store_true", help="Force download even if files already exist.")
     args = parser.parse_args()