diff --git a/Cargo.toml b/Cargo.toml
index bcd800930c51..165876691914 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -45,7 +45,7 @@ pulldown-cmark = { version = "0.11", default-features = false, features = ["html
 askama = { version = "0.15.4", default-features = false, features = ["alloc", "config", "derive"] }
 
 [dev-dependencies.toml]
-version = "0.9.7"
+version = "1.1"
 default-features = false
 # preserve_order keeps diagnostic output in file order
 features = ["parse", "preserve_order"]
diff --git a/clippy_config/Cargo.toml b/clippy_config/Cargo.toml
index 366c776b8f1a..5dbc0d37d4e9 100644
--- a/clippy_config/Cargo.toml
+++ b/clippy_config/Cargo.toml
@@ -10,7 +10,7 @@ publish = false
 clippy_utils = { path = "../clippy_utils" }
 itertools = "0.12"
 serde = { version = "1.0", features = ["derive"] }
-toml = "0.7.3"
+toml = "1.1"
 
 [dev-dependencies]
 walkdir = "2.3"
diff --git a/clippy_config/src/conf.rs b/clippy_config/src/conf.rs
index 41099f94b044..c3797189f797 100644
--- a/clippy_config/src/conf.rs
+++ b/clippy_config/src/conf.rs
@@ -974,7 +974,9 @@ pub fn lookup_conf_file() -> io::Result<(Option<PathBuf>, Vec<String>)> {
 }
 
 fn deserialize(file: &SourceFile) -> TryConf {
-    match toml::de::Deserializer::new(file.src.as_ref().unwrap()).deserialize_map(ConfVisitor(file)) {
+    match toml::de::Deserializer::parse(file.src.as_ref().unwrap())
+        .and_then(|deserializer| deserializer.deserialize_map(ConfVisitor(file)))
+    {
         Ok(mut conf) => {
             extend_vec_if_indicator_present(&mut conf.conf.disallowed_names, DEFAULT_DISALLOWED_NAMES);
             extend_vec_if_indicator_present(&mut conf.conf.allowed_prefixes, DEFAULT_ALLOWED_PREFIXES);
diff --git a/clippy_lints/Cargo.toml b/clippy_lints/Cargo.toml
index 51e753efb52e..04544594ae00 100644
--- a/clippy_lints/Cargo.toml
+++ b/clippy_lints/Cargo.toml
@@ -24,7 +24,7 @@ semver = "1.0"
 url = "2.2"
 
 [dependencies.toml]
-version = "0.9.7"
+version = "1.1"
 default-features = false
 # preserve_order keeps diagnostic output in file order
 features = ["parse", "preserve_order"]
diff --git a/lintcheck/Cargo.toml b/lintcheck/Cargo.toml
index 34281f9f721b..e1abf51b59fc 100644
--- a/lintcheck/Cargo.toml
+++ b/lintcheck/Cargo.toml
@@ -22,6 +22,6 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0.85"
 strip-ansi-escapes = "0.2.0"
 tar = "0.4.45"
-toml = "0.9.7"
+toml = "1.1"
 ureq = { version = "2.2", features = ["json"] }
 walkdir = "2.3"
diff --git a/tests/ui-toml/bad_toml/conf_bad_toml.rs b/tests/ui-toml/bad_toml/conf_bad_toml.rs
index c69fcd300335..3b34ddf89418 100644
--- a/tests/ui-toml/bad_toml/conf_bad_toml.rs
+++ b/tests/ui-toml/bad_toml/conf_bad_toml.rs
@@ -1,3 +1,3 @@
-//@error-in-other-file: error reading Clippy's configuration file: expected `.`, `=`
+//@error-in-other-file: error reading Clippy's configuration file: key with no value, expected `=`
 
 fn main() {}
diff --git a/tests/ui-toml/bad_toml/conf_bad_toml.stderr b/tests/ui-toml/bad_toml/conf_bad_toml.stderr
index eaf174b04b49..1dea94a58b60 100644
--- a/tests/ui-toml/bad_toml/conf_bad_toml.stderr
+++ b/tests/ui-toml/bad_toml/conf_bad_toml.stderr
@@ -1,4 +1,4 @@
-error: error reading Clippy's configuration file: expected `.`, `=`
+error: error reading Clippy's configuration file: key with no value, expected `=`
   --> $DIR/tests/ui-toml/bad_toml/clippy.toml:1:4
    |
 LL | fn this_is_obviously(not: a, toml: file) {
diff --git a/tests/ui-toml/duplicated_keys/duplicated_keys.rs b/tests/ui-toml/duplicated_keys/duplicated_keys.rs
index 187775545ed7..1a275e689276 100644
--- a/tests/ui-toml/duplicated_keys/duplicated_keys.rs
+++ b/tests/ui-toml/duplicated_keys/duplicated_keys.rs
@@ -1,3 +1,3 @@
-//@error-in-other-file: duplicate key `cognitive-complexity-threshold`
+//@error-in-other-file: duplicate key
 
 fn main() {}
diff --git a/tests/ui-toml/duplicated_keys/duplicated_keys.stderr b/tests/ui-toml/duplicated_keys/duplicated_keys.stderr
index 9f11c94ded2b..b36ffdf865bc 100644
--- a/tests/ui-toml/duplicated_keys/duplicated_keys.stderr
+++ b/tests/ui-toml/duplicated_keys/duplicated_keys.stderr
@@ -1,8 +1,8 @@
-error: error reading Clippy's configuration file: duplicate key `cognitive-complexity-threshold` in document root
+error: error reading Clippy's configuration file: duplicate key
   --> $DIR/tests/ui-toml/duplicated_keys/clippy.toml:2:1
    |
 LL | cognitive-complexity-threshold = 4
-   | ^
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui-toml/toml_invalid_path/conf_invalid_path.stderr b/tests/ui-toml/toml_invalid_path/conf_invalid_path.stderr
index 59a427dc99ca..96f419a9de1f 100644
--- a/tests/ui-toml/toml_invalid_path/conf_invalid_path.stderr
+++ b/tests/ui-toml/toml_invalid_path/conf_invalid_path.stderr
@@ -1,36 +1,32 @@
 warning: expected a macro, found a primitive type
   --> $DIR/tests/ui-toml/toml_invalid_path/clippy.toml:1:1
    |
-LL | / [[disallowed-macros]]
-LL | | path = "bool"
-   | |_____________^
+LL | [[disallowed-macros]]
+   | ^^^^^^^^^^^^^^^^^^^^^
    |
    = help: add `allow-invalid = true` to the entry to suppress this warning
 
 warning: `std::process::current_exe` does not refer to a reachable function
   --> $DIR/tests/ui-toml/toml_invalid_path/clippy.toml:4:1
    |
-LL | / [[disallowed-methods]]
-LL | | path = "std::process::current_exe"
-   | |__________________________________^
+LL | [[disallowed-methods]]
+   | ^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: add `allow-invalid = true` to the entry to suppress this warning
 
 warning: `` does not refer to a reachable function
   --> $DIR/tests/ui-toml/toml_invalid_path/clippy.toml:7:1
    |
-LL | / [[disallowed-methods]]
-LL | | path = ""
-   | |_________^
+LL | [[disallowed-methods]]
+   | ^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: add `allow-invalid = true` to the entry to suppress this warning
 
 warning: expected a type, found a variant
   --> $DIR/tests/ui-toml/toml_invalid_path/clippy.toml:10:1
    |
-LL | / [[disallowed-types]]
-LL | | path = "std::result::Result::Err"
-   | |_________________________________^
+LL | [[disallowed-types]]
+   | ^^^^^^^^^^^^^^^^^^^^
    |
    = help: add `allow-invalid = true` to the entry to suppress this warning
 
diff --git a/tests/ui-toml/toml_unloaded_crate/conf_unloaded_crate.stderr b/tests/ui-toml/toml_unloaded_crate/conf_unloaded_crate.stderr
index e5fd548b26df..3c23a195897a 100644
--- a/tests/ui-toml/toml_unloaded_crate/conf_unloaded_crate.stderr
+++ b/tests/ui-toml/toml_unloaded_crate/conf_unloaded_crate.stderr
@@ -1,18 +1,16 @@
 warning: `regex::Regex::new_` does not refer to a reachable function
   --> $DIR/tests/ui-toml/toml_unloaded_crate/clippy.toml:3:1
    |
-LL | / [[disallowed-methods]]
-LL | | path = "regex::Regex::new_"
-   | |___________________________^
+LL | [[disallowed-methods]]
+   | ^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: add `allow-invalid = true` to the entry to suppress this warning
 
 warning: `regex::Regex_::new` does not refer to a reachable function
   --> $DIR/tests/ui-toml/toml_unloaded_crate/clippy.toml:6:1
    |
-LL | / [[disallowed-methods]]
-LL | | path = "regex::Regex_::new"
-   | |___________________________^
+LL | [[disallowed-methods]]
+   | ^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: add `allow-invalid = true` to the entry to suppress this warning