diff --git a/frb_rust/src/codec/dco.rs b/frb_rust/src/codec/dco.rs
index efbf847d81..032525e8fb 100644
--- a/frb_rust/src/codec/dco.rs
+++ b/frb_rust/src/codec/dco.rs
@@ -42,18 +42,18 @@ impl Rust2DartMessageTrait for Rust2DartMessageDco {
     }
 
     unsafe fn from_raw_wire_sync(raw: Self::WireSyncRust2DartType) -> Self {
-        #[cfg(not(wasm))]
+        #[cfg(not(target_family = "wasm"))]
         return Self(*crate::for_generated::box_from_leak_ptr(raw));
 
-        #[cfg(wasm)]
+        #[cfg(target_family = "wasm")]
         return Self(raw);
     }
 
     fn into_raw_wire_sync(self) -> Self::WireSyncRust2DartType {
-        #[cfg(not(wasm))]
+        #[cfg(not(target_family = "wasm"))]
         return crate::for_generated::new_leak_box_ptr(self.0);
 
-        #[cfg(wasm)]
+        #[cfg(target_family = "wasm")]
         return self.0;
     }
 }
@@ -78,7 +78,7 @@ where
 #[cfg(test)]
 mod tests {
 
-    #[cfg(not(wasm))]
+    #[cfg(not(target_family = "wasm"))]
     #[test]
     fn test_simplest() {
         use crate::codec::Rust2DartMessageTrait;
diff --git a/frb_rust/src/codec/sse.rs b/frb_rust/src/codec/sse.rs
index 4cb5311a40..e5d701ce1d 100644
--- a/frb_rust/src/codec/sse.rs
+++ b/frb_rust/src/codec/sse.rs
@@ -63,24 +63,24 @@ impl Rust2DartMessageTrait for Rust2DartMessageSse {
     }
 
     unsafe fn from_raw_wire_sync(raw: Self::WireSyncRust2DartType) -> Self {
-        #[cfg(not(wasm))]
+        #[cfg(not(target_family = "wasm"))]
         {
             let WireSyncRust2DartSse { ptr, len } = raw;
             Self(crate::for_generated::vec_from_leak_ptr(ptr, len))
         }
 
-        #[cfg(wasm)]
+        #[cfg(target_family = "wasm")]
         Self(js_sys::Uint8Array::new(&raw).to_vec())
     }
 
     fn into_raw_wire_sync(self) -> Self::WireSyncRust2DartType {
-        #[cfg(not(wasm))]
+        #[cfg(not(target_family = "wasm"))]
         {
             let (ptr, len) = crate::for_generated::into_leak_vec_ptr(self.0);
             WireSyncRust2DartSse { ptr, len }
         }
 
-        #[cfg(wasm)]
+        #[cfg(target_family = "wasm")]
         return <js_sys::Uint8Array>::from(self.0.as_slice()).into();
     }
 }
@@ -101,9 +101,9 @@ impl Dart2RustMessageSse {
         rust_vec_len: i32,
         data_len: i32,
     ) -> Self {
-        #[cfg(not(wasm))]
+        #[cfg(not(target_family = "wasm"))]
         let vec = crate::for_generated::vec_from_leak_ptr(ptr, rust_vec_len);
-        #[cfg(wasm)]
+        #[cfg(target_family = "wasm")]
         let vec = js_sys::Uint8Array::new(&ptr).to_vec();
 
         Self { vec, data_len }
diff --git a/frb_rust/src/dart_opaque/boxes/mod.rs b/frb_rust/src/dart_opaque/boxes/mod.rs
index 01c84d2159..7fd7097b8f 100644
--- a/frb_rust/src/dart_opaque/boxes/mod.rs
+++ b/frb_rust/src/dart_opaque/boxes/mod.rs
@@ -1,4 +1,4 @@
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 pub(crate) mod dart_isolate_box;
 pub(crate) mod guarded_box;
 pub(crate) mod thread_box;
diff --git a/frb_rust/src/dart_opaque/boxes/thread_box.rs b/frb_rust/src/dart_opaque/boxes/thread_box.rs
index 2e871bc388..b490004873 100644
--- a/frb_rust/src/dart_opaque/boxes/thread_box.rs
+++ b/frb_rust/src/dart_opaque/boxes/thread_box.rs
@@ -50,7 +50,7 @@ impl GuardedBoxContext for GuardedBoxContextThread {
     }
 }
 
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 #[cfg(test)]
 mod tests {
     use crate::dart_opaque::boxes::thread_box::ThreadBox;
diff --git a/frb_rust/src/dart_opaque/dart2rust.rs b/frb_rust/src/dart_opaque/dart2rust.rs
index 813b319da0..faf20c73af 100644
--- a/frb_rust/src/dart_opaque/dart2rust.rs
+++ b/frb_rust/src/dart_opaque/dart2rust.rs
@@ -1,12 +1,12 @@
 use super::{DartOpaque, GeneralizedDartHandle};
 use crate::platform_types::{message_port_to_handle, MessagePort};
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 use wasm_bindgen::prelude::*;
 
 /// # Safety
 ///
 /// This should never be called manually.
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub unsafe fn cst_decode_dart_opaque(raw: wasm_bindgen::JsValue) -> DartOpaque {
     #[cfg(target_pointer_width = "64")]
     {
@@ -19,7 +19,7 @@ pub unsafe fn cst_decode_dart_opaque(raw: wasm_bindgen::JsValue) -> DartOpaque {
 /// # Safety
 ///
 /// This should never be called manually.
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 pub unsafe fn cst_decode_dart_opaque(raw: usize) -> DartOpaque {
     DartOpaque::from_raw(raw as _)
 }
@@ -34,7 +34,7 @@ pub unsafe fn sse_decode_dart_opaque(raw: usize) -> DartOpaque {
 /// # Safety
 ///
 /// This should never be called manually.
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 #[wasm_bindgen]
 pub unsafe fn dart_opaque_dart2rust_encode(
     handle: GeneralizedDartHandle,
@@ -46,7 +46,7 @@ pub unsafe fn dart_opaque_dart2rust_encode(
 /// # Safety
 ///
 /// This should never be called manually.
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 #[no_mangle]
 pub unsafe extern "C" fn dart_opaque_dart2rust_encode(
     handle: GeneralizedDartHandle,
diff --git a/frb_rust/src/dart_opaque/mod.rs b/frb_rust/src/dart_opaque/mod.rs
index eb8218c7c6..0f8f7efb55 100644
--- a/frb_rust/src/dart_opaque/mod.rs
+++ b/frb_rust/src/dart_opaque/mod.rs
@@ -2,18 +2,18 @@ use crate::platform_types::SendableMessagePortHandle;
 use std::sync::Arc;
 
 /// cbindgen:ignore
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 mod web;
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub use web::*;
 
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 mod io;
 
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 pub use io::*;
 
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 mod auto_drop_dart_persistent_handle;
 
 pub(crate) mod action;
diff --git a/frb_rust/src/dart_opaque/non_clone.rs b/frb_rust/src/dart_opaque/non_clone.rs
index 5385d7155d..89b477f410 100644
--- a/frb_rust/src/dart_opaque/non_clone.rs
+++ b/frb_rust/src/dart_opaque/non_clone.rs
@@ -7,7 +7,7 @@ use crate::generalized_isolate::Channel;
 use crate::generalized_isolate::IntoDart;
 use crate::misc::logs::log_warn_or_println;
 use crate::platform_types::{handle_to_message_port, SendableMessagePortHandle};
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 use wasm_bindgen::prelude::*;
 
 #[derive(Debug)]
@@ -91,13 +91,13 @@ fn drop_thread_box_persistent_handle_via_port(
     };
 }
 
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 #[no_mangle]
 pub unsafe extern "C" fn dart_opaque_drop_thread_box_persistent_handle(ptr: usize) {
     dart_opaque_drop_thread_box_persistent_handle_inner(ptr)
 }
 
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 #[wasm_bindgen]
 pub unsafe extern "C" fn dart_opaque_drop_thread_box_persistent_handle(ptr: usize) {
     dart_opaque_drop_thread_box_persistent_handle_inner(ptr)
diff --git a/frb_rust/src/dart_opaque/rust2dart.rs b/frb_rust/src/dart_opaque/rust2dart.rs
index 3b70e7bf8d..fd582423e5 100644
--- a/frb_rust/src/dart_opaque/rust2dart.rs
+++ b/frb_rust/src/dart_opaque/rust2dart.rs
@@ -1,7 +1,7 @@
 use super::{DartOpaque, GeneralizedDartHandle};
 use crate::generalized_isolate::IntoDart;
 use crate::platform_types::DartAbi;
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 use wasm_bindgen::prelude::*;
 
 impl From<DartOpaque> for DartAbi {
@@ -16,13 +16,13 @@ impl DartOpaque {
     }
 }
 
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 #[wasm_bindgen]
 pub unsafe fn dart_opaque_rust2dart_decode(ptr: usize) -> GeneralizedDartHandle {
     dart_opaque_rust2dart_decode_inner(ptr)
 }
 
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 #[no_mangle]
 pub unsafe extern "C" fn dart_opaque_rust2dart_decode(ptr: usize) -> GeneralizedDartHandle {
     dart_opaque_rust2dart_decode_inner(ptr)
diff --git a/frb_rust/src/ffi_binding/mod.rs b/frb_rust/src/ffi_binding/mod.rs
index 408d11fc35..7456d4bb8f 100644
--- a/frb_rust/src/ffi_binding/mod.rs
+++ b/frb_rust/src/ffi_binding/mod.rs
@@ -1,14 +1,14 @@
 use crate::for_generated::{into_leak_vec_ptr, new_leak_vec_ptr, vec_from_leak_ptr};
 
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 mod io;
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 #[allow(unused)]
 pub use io::*;
 
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 mod web;
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 #[allow(unused)]
 pub use web::*;
 
diff --git a/frb_rust/src/for_generated/cast.rs b/frb_rust/src/for_generated/cast.rs
index ab19908872..0f180c4696 100644
--- a/frb_rust/src/for_generated/cast.rs
+++ b/frb_rust/src/for_generated/cast.rs
@@ -1,6 +1,6 @@
 /// Cast a byte buffer into a boxed slice of the target type without making any copies.
 /// Panics if the cast fails.
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub fn slice_from_byte_buffer<T: bytemuck::Pod>(buffer: Vec<u8>) -> Box<[T]> {
     let buf = Box::leak(buffer.into_boxed_slice());
     match bytemuck::try_cast_slice_mut(buf) {
diff --git a/frb_rust/src/for_generated/mod.rs b/frb_rust/src/for_generated/mod.rs
index 4417ca2944..49fbf1441b 100644
--- a/frb_rust/src/for_generated/mod.rs
+++ b/frb_rust/src/for_generated/mod.rs
@@ -41,7 +41,7 @@ pub use crate::lockable::{
 #[allow(unused)]
 pub use crate::misc::manual_impl::*;
 pub use crate::misc::version::FLUTTER_RUST_BRIDGE_RUNTIME_VERSION;
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub use crate::misc::web_utils;
 pub use crate::platform_types::{
     DartAbi, MessagePort, PlatformGeneralizedUint8ListPtr, WireSyncRust2DartDco,
@@ -63,23 +63,23 @@ pub use crate::rust_auto_opaque::{inner::RustAutoOpaqueInner, RustAutoOpaqueBase
 pub use crate::rust_opaque::{dart2rust::decode_rust_opaque_nom, RustOpaqueBase};
 pub use crate::stream::stream_sink::StreamSinkBase;
 pub use crate::thread_pool::{BaseThreadPool, SimpleThreadPool};
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub use crate::web_transfer::transfer_closure::TransferClosure;
 #[cfg(feature = "anyhow")]
 pub use anyhow;
 pub use byteorder;
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub use cast::slice_from_byte_buffer;
 #[cfg(feature = "dart-opaque")]
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 pub use dart_sys_fork as dart_sys;
 #[cfg(feature = "rust-async")]
 pub use futures;
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub use js_sys;
 pub use lazy_static::lazy_static;
 #[cfg(feature = "rust-async")]
 pub use misc_rust_async::*;
 pub use pointer::*;
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub use wasm_bindgen;
diff --git a/frb_rust/src/generalized_isolate/mod.rs b/frb_rust/src/generalized_isolate/mod.rs
index 45760da23d..f81a28f14d 100644
--- a/frb_rust/src/generalized_isolate/mod.rs
+++ b/frb_rust/src/generalized_isolate/mod.rs
@@ -1,10 +1,10 @@
 /// cbindgen:ignore
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 mod web;
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub use web::*;
 
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 mod io;
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 pub use io::*;
diff --git a/frb_rust/src/handler/handler.rs b/frb_rust/src/handler/handler.rs
index 9e5852a5de..1f5d73cd4e 100644
--- a/frb_rust/src/handler/handler.rs
+++ b/frb_rust/src/handler/handler.rs
@@ -87,14 +87,14 @@ pub enum FfiCallMode {
     Sync,
 }
 
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 pub trait TaskRetFutTrait: Send {}
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 impl<T: Send> TaskRetFutTrait for T {}
 
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub trait TaskRetFutTrait {}
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 impl<T> TaskRetFutTrait for T {}
 
 // Originally there were things for StreamSink, but it was moved, so now it is empty
diff --git a/frb_rust/src/misc/manual_impl.rs b/frb_rust/src/misc/manual_impl.rs
index 48e319499c..2ad1e2ff56 100644
--- a/frb_rust/src/misc/manual_impl.rs
+++ b/frb_rust/src/misc/manual_impl.rs
@@ -1,9 +1,9 @@
 #[cfg(feature = "chrono")]
 #[inline]
 pub fn decode_timestamp(ts: i64) -> Timestamp {
-    #[cfg(wasm)]
+    #[cfg(target_family = "wasm")]
     const PRECISION: i64 = 1_000;
-    #[cfg(not(wasm))]
+    #[cfg(not(target_family = "wasm"))]
     const PRECISION: i64 = 1_000_000;
 
     let s = ts / PRECISION;
@@ -53,7 +53,7 @@ pub fn decode_uuid(id: Vec<u8>) -> uuid::Uuid {
 mod tests {
     #[test]
     fn test_decode_timestamp() {
-        #[cfg(not(wasm))]
+        #[cfg(not(target_family = "wasm"))]
         {
             // input in microseconds
             let input: i64 = 3_496_567_123;
@@ -62,7 +62,7 @@ mod tests {
             assert_eq!(ns, 567_123_000);
         }
 
-        #[cfg(wasm)]
+        #[cfg(target_family = "wasm")]
         {
             // input in milliseconds
             let input: i64 = 3_496_567;
diff --git a/frb_rust/src/misc/user_utils.rs b/frb_rust/src/misc/user_utils.rs
index a31611a150..f7e654eba3 100644
--- a/frb_rust/src/misc/user_utils.rs
+++ b/frb_rust/src/misc/user_utils.rs
@@ -10,7 +10,7 @@ pub fn setup_default_user_utils() {
 }
 
 fn setup_backtrace() {
-    #[cfg(not(wasm))]
+    #[cfg(not(target_family = "wasm"))]
     if std::env::var("RUST_BACKTRACE").err() == Some(std::env::VarError::NotPresent) {
         std::env::set_var("RUST_BACKTRACE", "1");
     } else {
@@ -33,7 +33,7 @@ fn setup_log_to_console() {
         .level_filter(log::LevelFilter::Trace)
         .init();
 
-    #[cfg(wasm)]
+    #[cfg(target_family = "wasm")]
     let _ = crate::misc::web_utils::WebConsoleLogger::init();
 
     // TODO add more platforms
diff --git a/frb_rust/src/platform_types/mod.rs b/frb_rust/src/platform_types/mod.rs
index 45760da23d..f81a28f14d 100644
--- a/frb_rust/src/platform_types/mod.rs
+++ b/frb_rust/src/platform_types/mod.rs
@@ -1,10 +1,10 @@
 /// cbindgen:ignore
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 mod web;
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub use web::*;
 
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 mod io;
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 pub use io::*;
diff --git a/frb_rust/src/rust_async/mod.rs b/frb_rust/src/rust_async/mod.rs
index 6b7c6deccb..e4b31df02a 100644
--- a/frb_rust/src/rust_async/mod.rs
+++ b/frb_rust/src/rust_async/mod.rs
@@ -1,15 +1,15 @@
 #[cfg(feature = "rust-async")]
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 mod io;
 #[cfg(feature = "rust-async")]
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 pub use io::*;
 
 #[cfg(feature = "rust-async")]
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 mod web;
 #[cfg(feature = "rust-async")]
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub use web::*;
 
 #[cfg(not(feature = "rust-async"))]
diff --git a/frb_rust/src/rust_auto_opaque/api.rs b/frb_rust/src/rust_auto_opaque/api.rs
index a145eed5aa..a4d7c432fd 100644
--- a/frb_rust/src/rust_auto_opaque/api.rs
+++ b/frb_rust/src/rust_auto_opaque/api.rs
@@ -50,7 +50,7 @@ mod tests {
         assert_eq!(*opaque.try_write().unwrap(), 42);
     }
 
-    #[cfg(not(wasm))]
+    #[cfg(not(target_family = "wasm"))]
     #[tokio::test]
     async fn test_api_async() {
         let opaque = RustAutoOpaqueNom::new(42);
diff --git a/frb_rust/src/third_party/mod.rs b/frb_rust/src/third_party/mod.rs
index 3689e034f5..9addf4b2c6 100644
--- a/frb_rust/src/third_party/mod.rs
+++ b/frb_rust/src/third_party/mod.rs
@@ -1,2 +1,2 @@
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub(crate) mod wasm_bindgen;
diff --git a/frb_rust/src/thread_pool/mod.rs b/frb_rust/src/thread_pool/mod.rs
index dc3c97b302..d8ae5a1e0c 100644
--- a/frb_rust/src/thread_pool/mod.rs
+++ b/frb_rust/src/thread_pool/mod.rs
@@ -1,15 +1,15 @@
 #[cfg(feature = "thread-pool")]
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 mod web;
 #[cfg(feature = "thread-pool")]
-#[cfg(wasm)]
+#[cfg(target_family = "wasm")]
 pub use web::*;
 
 #[cfg(feature = "thread-pool")]
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 mod io;
 #[cfg(feature = "thread-pool")]
-#[cfg(not(wasm))]
+#[cfg(not(target_family = "wasm"))]
 pub use io::*;
 
 #[cfg(not(feature = "thread-pool"))]