diff --git a/Cargo.toml b/Cargo.toml
index 780422e..27755bb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,2 +1,3 @@
 [workspace]
 members = ["crates/open_jtalk-sys", "crates/open_jtalk"]
+resolver = "2"