diff --git a/ark/type/__tests__/keywords/uuid.test.ts b/ark/type/__tests__/keywords/uuid.test.ts
index 0a204adede..3bd966dd5a 100644
--- a/ark/type/__tests__/keywords/uuid.test.ts
+++ b/ark/type/__tests__/keywords/uuid.test.ts
@@ -24,4 +24,14 @@ contextualize(() => {
 			'must be a UUIDv4 (was "f70b8242-dd57-5e6b-b0b7-649d997140a0")'
 		)
 	})
+
+	it("rejects partial matches", () => {
+		const Uuid = type("string.uuid")
+		attest(Uuid("dbb1e8e0-40fc-4c14-87eb-61b25d166a1b extra").toString()).snap(
+			'must be a UUID (was "dbb1e8e0-40fc-4c14-87eb-61b25d166a1b extra")'
+		)
+		attest(Uuid("prefix dbb1e8e0-40fc-4c14-87eb-61b25d166a1b").toString()).snap(
+			'must be a UUID (was "prefix dbb1e8e0-40fc-4c14-87eb-61b25d166a1b")'
+		)
+	})
 })
diff --git a/ark/type/keywords/string.ts b/ark/type/keywords/string.ts
index 05064933b5..0779d70a55 100644
--- a/ark/type/keywords/string.ts
+++ b/ark/type/keywords/string.ts
@@ -841,7 +841,7 @@ export const uuid = Scope.module(
 		"#nil": "'00000000-0000-0000-0000-000000000000'",
 		"#max": "'ffffffff-ffff-ffff-ffff-ffffffffffff'",
 		"#versioned":
-			/[\da-f]{8}-[\da-f]{4}-[1-8][\da-f]{3}-[89ab][\da-f]{3}-[\da-f]{12}/i,
+			/^[\da-f]{8}-[\da-f]{4}-[1-8][\da-f]{3}-[89ab][\da-f]{3}-[\da-f]{12}$/i,
 		v1: regexStringNode(
 			/^[\da-f]{8}-[\da-f]{4}-1[\da-f]{3}-[89ab][\da-f]{3}-[\da-f]{12}$/i,
 			"a UUIDv1"