diff --git a/polkadot/runtime/rococo/Cargo.toml b/polkadot/runtime/rococo/Cargo.toml
index bda7bf8fcad1..48a73f52f540 100644
--- a/polkadot/runtime/rococo/Cargo.toml
+++ b/polkadot/runtime/rococo/Cargo.toml
@@ -8,6 +8,7 @@ edition.workspace = true
 license.workspace = true
 homepage.workspace = true
 repository.workspace = true
+rust-version = "1.75.0"
 
 [lints]
 workspace = true