diff --git a/demo/runtime/wasm/target/wasm32-unknown-unknown/release/demo_runtime.compact.wasm b/demo/runtime/wasm/target/wasm32-unknown-unknown/release/demo_runtime.compact.wasm
index 5275ded0aac1f..0e3d1d96664c5 100644
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diff --git a/demo/runtime/wasm/target/wasm32-unknown-unknown/release/demo_runtime.wasm b/demo/runtime/wasm/target/wasm32-unknown-unknown/release/demo_runtime.wasm
index 76d1188dc5891..c77f7709d26e6 100755
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diff --git a/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.compact.wasm b/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.compact.wasm
index bc0861d31f35d..ed4b07987ed61 100644
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diff --git a/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.wasm b/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.wasm
index 98f0bf055e032..2dacd6f14b05f 100755
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diff --git a/substrate/executor/wasm/target/wasm32-unknown-unknown/release/runtime_test.compact.wasm b/substrate/executor/wasm/target/wasm32-unknown-unknown/release/runtime_test.compact.wasm
index 6f29446e089cb..329c06d241f26 100644
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diff --git a/substrate/executor/wasm/target/wasm32-unknown-unknown/release/runtime_test.wasm b/substrate/executor/wasm/target/wasm32-unknown-unknown/release/runtime_test.wasm
index 06dbcefbc13df..93a053d21df1a 100755
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diff --git a/substrate/pwasm-alloc/src/lib.rs b/substrate/pwasm-alloc/src/lib.rs
index b1afd5af00328..85be153815059 100644
--- a/substrate/pwasm-alloc/src/lib.rs
+++ b/substrate/pwasm-alloc/src/lib.rs
@@ -20,17 +20,17 @@ mod __impl {
 	extern crate alloc;
 	extern crate pwasm_libc;
 
-	use self::alloc::heap::{Alloc, Layout, AllocErr};
+	use self::alloc::heap::{GlobalAlloc, Layout, Opaque};
 
 	use super::WasmAllocator;
 
-	unsafe impl<'a> Alloc for &'a WasmAllocator {
-		unsafe fn alloc(&mut self, layout: Layout) -> Result<*mut u8, AllocErr> {
-			Ok(pwasm_libc::malloc(layout.size()))
+	unsafe impl GlobalAlloc for WasmAllocator {
+		unsafe fn alloc(&self, layout: Layout) -> *mut Opaque {
+			pwasm_libc::malloc(layout.size()) as *mut Opaque
 		}
 
-		unsafe fn dealloc(&mut self, ptr: *mut u8, _layout: Layout) {
-			pwasm_libc::free(ptr)
+		unsafe fn dealloc(&self, ptr: *mut Opaque, _layout: Layout) {
+			pwasm_libc::free(ptr as *mut u8)
 		}
 	}
 }
diff --git a/substrate/test-runtime/wasm/target/wasm32-unknown-unknown/release/substrate_test_runtime.compact.wasm b/substrate/test-runtime/wasm/target/wasm32-unknown-unknown/release/substrate_test_runtime.compact.wasm
index b56b76b0ab746..7555a364a5a92 100644
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diff --git a/substrate/test-runtime/wasm/target/wasm32-unknown-unknown/release/substrate_test_runtime.wasm b/substrate/test-runtime/wasm/target/wasm32-unknown-unknown/release/substrate_test_runtime.wasm
index a3ffd5df44f23..92842089ef45f 100755
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