diff --git a/rebar.config b/rebar.config
index 00eaa5fc..a614cb6e 100644
--- a/rebar.config
+++ b/rebar.config
@@ -53,6 +53,7 @@
 ]}.
 
 {gpb_opts, [
+    {introspect_proto_defs_version, 2},
     {i, "src"},
     {o_erl, "src/pb"},
     {o_hrl, "src/pb"},
diff --git a/src/peerbook/libp2p_peer.erl b/src/peerbook/libp2p_peer.erl
index fd4b2de0..af9df0e0 100644
--- a/src/peerbook/libp2p_peer.erl
+++ b/src/peerbook/libp2p_peer.erl
@@ -454,5 +454,5 @@ encode_map(Map) ->
                          end, [], Map)).
 
 load_pb_msg_defs() ->
-    ok = enif_protobuf:load_cache(libp2p_peer_pb:get_msg_defs()),
+    ok = enif_protobuf:load_cache(libp2p_peer_pb:get_proto_defs()),
     enif_protobuf:set_opts([{string_as_list, true}]).