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+
+# Updating `wasmtime`
+
+Projects depending upon `proxy-wasm-cpp-host` and `wasmtime` should
+ensure that the `wasmtime` dependency here is updated whenever updating
+`proxy-wasm-cpp-host`.
+
+## Install `rust`
+
+Ensure you have the latest version of rust.
+
+```console
+$ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+$ rustup update
+```
+
+## Install `cargo-raze`
+
+```console
+$ cargo install cargo-raze --version 0.14.1.
+```
+
+## Generate lockfile
+
+```console
+$ cd bazel/cargo/wasmtime
+$ cargo raze --generate-lockfile
+$ cd ../..
+```
+
+## Resolve duplicates in lockfile
+
+Currently due to an issue with raze (https://github.com/google/cargo-raze/issues/451) it
+is likely that you will need to clear up any duplicates created in the lockfile.
+
+Resolving this issue can be tricky as updates can generate a lot of change, but essentially
+you will need to check the overall diff for any problematic files and check to see where new
+dependencies have been added.
+
+## Commit changes
+
+```console
+$ git add bazel/cargo/wasmtime
+$ git commit ...
+```