diff --git a/polkadot/runtime/rococo/src/lib.rs b/polkadot/runtime/rococo/src/lib.rs
index 5323adeefc..3cb61efd3c 100644
--- a/polkadot/runtime/rococo/src/lib.rs
+++ b/polkadot/runtime/rococo/src/lib.rs
@@ -627,7 +627,7 @@ type LocalOriginConverter = (
 );
 
 parameter_types! {
-	pub const BaseXcmWeight: Weight = 100_000;
+	pub const BaseXcmWeight: Weight = 1_000_000_000;
 }
 
 /// The XCM router. When we want to send an XCM message, we use this type. It amalgamates all of our
diff --git a/polkadot/runtime/westend/src/lib.rs b/polkadot/runtime/westend/src/lib.rs
index 179088dc1a..196a28d578 100644
--- a/polkadot/runtime/westend/src/lib.rs
+++ b/polkadot/runtime/westend/src/lib.rs
@@ -952,7 +952,7 @@ type LocalOriginConverter = (
 );
 
 parameter_types! {
-	pub const BaseXcmWeight: Weight = 10_000_000;
+	pub const BaseXcmWeight: Weight = 1_000_000_000;
 }
 
 /// The XCM router. When we want to send an XCM message, we use this type. It amalgamates all of our