diff --git a/Cargo.toml b/Cargo.toml
index 9b0fb4c..c8ac2fd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,7 @@
 [workspace]
 
+resolver = "2"
+
 members = [
     "crdt-enc",
     "crdt-enc-gpgme",