diff --git a/Cargo.lock b/Cargo.lock
index 33fca6f..678b840 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -171,7 +171,7 @@ dependencies = [
 
 [[package]]
 name = "pyproject-toml"
-version = "0.13.1"
+version = "0.13.2"
 dependencies = [
  "glob",
  "indexmap",
diff --git a/Cargo.toml b/Cargo.toml
index b2e6d8b..763756a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pyproject-toml"
-version = "0.13.1"
+version = "0.13.2"
 description = "pyproject.toml parser in Rust"
 edition = "2021"
 license = "MIT"
diff --git a/Changelog.md b/Changelog.md
index 1fba272..ed0fdaf 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.13.2
+
+* Make `Contact` definition strict
+
+## 0.13.1
+
+* Fix `Contact` definition
+
 ## 0.13.0
 
 * Update to the provisional PEP 639. This is technically a breaking change, but only for fields previously in draft
diff --git a/src/lib.rs b/src/lib.rs
index 027d32c..b58c88e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -162,14 +162,19 @@ pub enum License {
 /// The entry is derived from the email format of `John Doe <john.doe@example.net>`. You need to
 /// provide at least name or email.
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq)]
-#[serde(untagged, expecting = "a table with 'name' and/or 'email' keys")]
+// deny_unknown_fields prevents using the name field when the email is not a string.
+#[serde(
+    untagged,
+    deny_unknown_fields,
+    expecting = "a table with 'name' and/or 'email' keys"
+)]
 pub enum Contact {
+    /// TODO(konsti): RFC 822 validation.
+    NameEmail { name: String, email: String },
     /// TODO(konsti): RFC 822 validation.
     Name { name: String },
     /// TODO(konsti): RFC 822 validation.
     Email { email: String },
-    /// TODO(konsti): RFC 822 validation.
-    NameEmail { name: String, email: String },
 }
 
 /// The `[dependency-groups]` section of pyproject.toml, as specified in PEP 735
@@ -475,4 +480,27 @@ iota = [{include-group = "alpha"}]
             }]
         );
     }
+
+    #[test]
+    fn invalid_email() {
+        let source = r#"
+[project]
+name = "hello-world"
+version = "0.1.0"
+# Ensure that the spans from toml handle utf-8 correctly
+authors = [
+    { name = "Z͑ͫ̓ͪ̂ͫ̽͏̴̙̤̞͉͚̯̞̠͍A̴̵̜̰͔ͫ͗͢L̠ͨͧͩ͘G̴̻͈͍͔̹̑͗̎̅͛́Ǫ̵̹̻̝̳͂̌̌͘", email = 1 }
+]
+"#;
+        let err = PyProjectToml::new(source).unwrap_err();
+        assert_eq!(
+            err.to_string(),
+            "TOML parse error at line 6, column 11
+  |
+6 | authors = [
+  |           ^
+a table with 'name' and/or 'email' keys
+"
+        );
+    }
 }