diff --git a/Cargo.lock b/Cargo.lock
index f5a77ec..a4f2548 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,4 +4,4 @@ version = 3
 
 [[package]]
 name = "mutex-extra"
-version = "0.9.8"
+version = "0.9.9"
diff --git a/Cargo.toml b/Cargo.toml
index a506942..0f4b9b9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 
 [package]
 name = "mutex-extra"
-version = "0.9.8"
+version = "0.9.9"
 description = "`RefMutex<T>` that is similar to `Mutex<T>` but is `Sync` and `Send` even if `T` isn't `Send`."
 homepage = "https://github.com/vporton/ref_mutex"
 repository = "https://github.com/vporton/ref_mutex"
diff --git a/README.md b/README.md
index ef8b428..b76d1c1 100644
--- a/README.md
+++ b/README.md
@@ -1,15 +1,10 @@
 ## `ref_mutex` Rust library
 
-**My code seems erroneous!** Don't use.
+Please instead use `Mutex<send_cell::Ref<T>>` (https://docs.rs/send-cell/).
 
-_Not much tested._
+---
 
-This library implement `RefMutex<T>` that is similar to `Mutex<T>` but is `Sync` and `Send`
-even if `T` isn't `Send`.
-
-TODO: It seems this can be instead be done as a patch to standard library:
+**My code is erroneous!** Don't use.
 
-```rust
-unsafe impl<'mutex, T: ?Sized + Sync> Sync for Mutex<'mutex, T> {}
-unsafe impl<'mutex, T: ?Sized> Send for Mutex<'mutex, T> { }
-```
\ No newline at end of file
+This library implement `RefMutex<T>` that is similar to `Mutex<T>` but is `Sync` and `Send`
+even if `T` isn't `Send`.
\ No newline at end of file