diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 250d042..8636cd2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -46,6 +46,9 @@ jobs:
           latest="$(curl -sL https://api.github.com/repos/rust-lang/rust/releases/latest | jq -r .tag_name)"
           echo "rust stable latest: ${latest}"
           echo "stable_latest=${latest}" >> "$GITHUB_OUTPUT"
+          echo "rust stable used: ${used}"
+          used="$(cargo --version | awk '{print $2}')"
+          echo "stable_used=${used}" >> "$GITHUB_OUTPUT"
       - name: check cache
         uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2
         id: cache
@@ -55,6 +58,10 @@ jobs:
             ~/.rustup/
             target/
           key: ${{ runner.os }}-rust-${{ steps.rust.outputs.stable_latest }}-${{ hashFiles('Cargo.toml') }}-${{ hashFiles('Cargo.lock') }}
+      - name: update toolchain
+        if: steps.rust.outputs.stable_latest != steps.rust.outputs.stable_used
+        run: |
+          rustup update stable
       - name: cargo fmt
         run: |
           cargo fmt -- --check --verbose
diff --git a/src/main.rs b/src/main.rs
index 205cf48..065b165 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,7 @@
 use log::{error, info, warn};
 
-use std::collections::{hash_map::DefaultHasher, hash_map::RandomState, HashMap};
-use std::hash::{BuildHasher, Hash, Hasher};
+use std::collections::HashMap;
+use std::hash::{BuildHasher, DefaultHasher, Hash, Hasher, RandomState};
 use teloxide::{
     dispatching::dialogue::{serializer::Json, ErasedStorage, SqliteStorage, Storage},
     prelude::*,