diff --git a/contracts/Cargo.toml b/contracts/Cargo.toml
index 8063d2f543..9ec0049b20 100644
--- a/contracts/Cargo.toml
+++ b/contracts/Cargo.toml
@@ -1,4 +1,5 @@
 [workspace]
+resolver = "2"
 members = [
     "coconut-bandwidth",
     "coconut-dkg",