diff --git a/polkadot/api/src/full.rs b/polkadot/api/src/full.rs
index caf9a89072..7a5aeb31e7 100644
--- a/polkadot/api/src/full.rs
+++ b/polkadot/api/src/full.rs
@@ -200,7 +200,7 @@ mod tests {
 			timestamp: Some(Default::default()),
 		};
 
-		::client::new_in_mem(LocalDispatch::with_heap_pages(8, 8), genesis_config).unwrap()
+		::client::new_in_mem(LocalDispatch::with_heap_pages(8), genesis_config).unwrap()
 	}
 
 	#[test]
diff --git a/polkadot/parachain/Cargo.toml b/polkadot/parachain/Cargo.toml
index 2b1eeca7e5..2197911ed4 100644
--- a/polkadot/parachain/Cargo.toml
+++ b/polkadot/parachain/Cargo.toml
@@ -6,7 +6,7 @@ description = "Types and utilities for creating and working with parachains"
 
 [dependencies]
 substrate-codec = { path = "../../substrate/codec", default-features = false }
-wasmi = { version = "0.3", optional = true }
+wasmi = { version = "0.4", optional = true }
 error-chain = { version = "0.12", optional = true }
 
 [dev-dependencies]