diff --git a/Cargo.toml b/Cargo.toml
index 037e8b7..38a0605 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,7 @@ documentation = "https://docs.rs/connection-string"
 description = "Connection string parsing in Rust (and WebAssembly)"
 readme = "README.md"
 edition = "2018"
+rust = "1.46"
 keywords = []
 categories = []
 authors = [