diff --git a/Package.swift b/Package.swift
index df85b66..52340a0 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.8
+// swift-tools-version:6.0
 
 import PackageDescription
 
@@ -19,7 +19,6 @@ let package = Package(
         )
     ],
     dependencies: [
-        .package(url: "https://github.com/apple/swift-docc-plugin", exact: "1.2.0"),
         .package(url: "https://github.com/krzysztofzablocki/Difference", exact: "1.0.2")
     ],
     targets: [
diff --git a/Sources/XCTestExtension/Expectations/PublisherExpectation.swift b/Sources/XCTestExtension/Expectations/PublisherExpectation.swift
index 1b37a60..f1253ed 100644
--- a/Sources/XCTestExtension/Expectations/PublisherExpectation.swift
+++ b/Sources/XCTestExtension/Expectations/PublisherExpectation.swift
@@ -2,7 +2,7 @@ import Combine
 import XCTest
 
 /// An expectation that is fulfilled when an `Option`'s `Predicate` for a `Publisher` is satisfied.
-public class PublisherExpectation<Publisher>: XCTestExpectation where Publisher: Combine.Publisher {
+public class PublisherExpectation<Publisher>: XCTestExpectation, @unchecked Sendable where Publisher: Combine.Publisher {
 
     private(set) var cancellables = [AnyCancellable]()
     private let observation: Observation