diff --git a/Cargo.toml b/Cargo.toml
index 9ae3d94..181e329 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,7 @@ serde_json = "1.0.91"
 siphasher = "0.3.10"
 strsim = "0.10.0"
 clap = { version = "4.2.5", features = ["derive"] }
-toml = "0.5.11"
+toml = "0.7.3"
 ureq = { version = "2.6.2", features = ["json"] }
 walkdir = "2.3.2"
 which = "4.4.0"
@@ -39,7 +39,7 @@ which = "4.4.0"
 [dev-dependencies]
 assert_cmd = "2.0.8"
 lazy_static = "1.4.0"
-predicates = "2.1.5"
-serial_test = "1.0.0"
+predicates = "3.0.3"
+serial_test = "2.0.0"
 tempfile = "3.3.0"
 
diff --git a/src/manifest/mod.rs b/src/manifest/mod.rs
index 8063dfe..6a76988 100644
--- a/src/manifest/mod.rs
+++ b/src/manifest/mod.rs
@@ -437,7 +437,7 @@ impl CrateData {
     pub fn parse_crate_data(manifest_path: &Path) -> Result<ManifestAndUnsedKeys> {
         let manifest = fs::read_to_string(&manifest_path)
             .with_context(|| anyhow!("failed to read: {}", manifest_path.display()))?;
-        let manifest = &mut toml::Deserializer::new(&manifest);
+        let manifest = toml::Deserializer::new(&manifest);
 
         let mut unused_keys = BTreeSet::new();
         let levenshtein_threshold = 1;