diff --git a/Cargo.toml b/Cargo.toml
index 60326cd55..e7fd38f37 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,6 +14,7 @@ members = [
     "askama_hyper",
     "testing",
 ]
+resolver = "2"
 
 default-members = [
     "askama",