diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9605fe5e5..9f7008c3c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,7 +24,7 @@ jobs:
     name: Lint Rust
     runs-on: ubuntu-latest
     env:
-      RUSTUP_TOOLCHAIN: 1.68.2
+      RUSTUP_TOOLCHAIN: 1.70.0
     steps:
       - uses: actions/checkout@v3
       - name: Install rustfmt and clippy
diff --git a/deltachat-rpc-server/src/main.rs b/deltachat-rpc-server/src/main.rs
index a635dddb5..e3d0b0b20 100644
--- a/deltachat-rpc-server/src/main.rs
+++ b/deltachat-rpc-server/src/main.rs
@@ -1,7 +1,7 @@
+//! Delta Chat core RPC server.
+//!
+//! It speaks JSON Lines over stdio.
 use std::env;
-///! Delta Chat core RPC server.
-///!
-///! It speaks JSON Lines over stdio.
 use std::path::PathBuf;
 use std::sync::Arc;