diff --git a/Cargo.toml b/Cargo.toml
index 325ee82..2c33d95 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ members = [
     "temp-server",
     "prismer",
 ]
+resolver = "2"
 
 [profile.release]
 lto = true