--- a/Cargo.lock
+++ b/Cargo.lock
@@ -112,17 +112,6 @@
 ]
 
 [[package]]
-name = "async-trait"
-version = "0.1.74"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a66537f1bb974b254c98ed142ff995236e81b9d0fe4db0575f46612cb15eb0f9"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.38",
-]
-
-[[package]]
 name = "autocfg"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -598,7 +587,6 @@
 dependencies = [
  "annotate-snippets",
  "anyhow",
- "async-trait",
  "bincode",
  "derivative",
  "hashbrown 0.14.2",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -35,7 +35,6 @@
 rustc-hash = "1.1"
 bincode = "1.3"
 annotate-snippets = "0.9.1"
-async-trait = "0.1.60"
 num-bigint = "0.4.3"
 derivative = "2.2.0"
 strsim = "0.10.0"
--- a/crates/jrsonnet-evaluator/Cargo.toml
+++ b/crates/jrsonnet-evaluator/Cargo.toml
@@ -14,7 +14,7 @@
 # Allows library authors to throw custom errors
 anyhow-error = ["anyhow"]
 # Adds ability to build import closure in async
-async-import = ["async-trait"]
+async-import = []
 
 # Allows to preserve field order in objects
 exp-preserve-order = []
@@ -54,8 +54,6 @@
 bincode = { workspace = true, optional = true }
 # Explaining traces
 annotate-snippets = { workspace = true, features = ["color"], optional = true }
-# Async imports
-async-trait = { workspace = true, optional = true }
 # Bigint
 num-bigint = { workspace = true, features = ["serde"], optional = true }
 derivative.workspace = true
--- a/crates/jrsonnet-evaluator/src/async_import.rs
+++ b/crates/jrsonnet-evaluator/src/async_import.rs
@@ -1,6 +1,5 @@
 use std::{cell::RefCell, path::Path};
 
-use async_trait::async_trait;
 use jrsonnet_gcmodule::Trace;
 use jrsonnet_interner::IStr;
 use jrsonnet_parser::{
@@ -218,7 +217,7 @@
 	}
 }
 
-#[async_trait(?Send)]
+#[allow(async_fn_in_trait)] // we don't care about `Send` bound
 pub trait AsyncImportResolver {
 	type Error;
 	/// Resolves file path, e.g. `(/home/user/manifests, b.libjsonnet)` can correspond
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,3 @@
+[toolchain]
+channel = "nightly-2023-10-28"
+components = ["rustfmt", "clippy"]