diff --git a/README.md b/README.md
index 488ac0f..466acd1 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,16 @@ You can install it by running:
 curl -fsSL https://deno.land/install.sh | sh
 ```
 
+## ink! notes
+
+If you are unable to compile ink contracts and encounter the following issue:
+
+```
+error: panic_immediate_abort is now a real panic strategy!
+```
+
+please try using Rust toolchain version 1.91.1, as newer toolchains may trigger this issue due to changes in panic strategy handling.
+
 # Building contracts
 
 We can now compile the contracts located in the `contracts/` directory:
diff --git a/utils/index.ts b/utils/index.ts
index 3097387..1c892ff 100644
--- a/utils/index.ts
+++ b/utils/index.ts
@@ -171,7 +171,7 @@ export async function createEnv({
             transactionHash: Hex,
         ) {
             return client.request({
-                method: 'substrate_postDispatchWeight' as never,
+                method: 'polkadot_postDispatchWeight' as never,
                 params: [
                     transactionHash,
                 ],