diff --git a/Sources/Relays/CurrentValueRelay.swift b/Sources/Relays/CurrentValueRelay.swift
index 6fa08ec..5d9f448 100644
--- a/Sources/Relays/CurrentValueRelay.swift
+++ b/Sources/Relays/CurrentValueRelay.swift
@@ -19,6 +19,8 @@ import Combine
 public class CurrentValueRelay<Output>: Relay {
     public var value: Output { storage.value }
     private let storage: CurrentValueSubject<Output, Never>
+    private let subscriptionsLock = Lock()
+    // All modifications to `subscriptions` should be protected by `lock` to ensure thread-safety.
     private var subscriptions = [Subscription<
         CurrentValueSubject<Output, Never>,
         AnySubscriber<Output, Never>
@@ -40,7 +42,9 @@ public class CurrentValueRelay<Output>: Relay {
 
     public func receive<S: Subscriber>(subscriber: S) where Output == S.Input, Failure == S.Failure {
         let subscription = Subscription(upstream: storage, downstream: AnySubscriber(subscriber))
+        subscriptionsLock.lock()
         subscriptions.append(subscription)
+        subscriptionsLock.unlock()
         subscriber.receive(subscription: subscription)
     }
 
@@ -53,8 +57,9 @@ public class CurrentValueRelay<Output>: Relay {
     }
 
     deinit {
-        // Send a finished event upon dealloation
+        // Send a finished event upon deallocation
         subscriptions.forEach { $0.forceFinish() }
+        subscriptionsLock.cleanupLock()
     }
 }
 
diff --git a/Tests/CurrentValueRelayTests.swift b/Tests/CurrentValueRelayTests.swift
index fb8035b..bc9cbd8 100644
--- a/Tests/CurrentValueRelayTests.swift
+++ b/Tests/CurrentValueRelayTests.swift
@@ -332,5 +332,13 @@ class CurrentValueRelayTests: XCTestCase {
         XCTAssertTrue(StoredObject2.storedObjectReleased)
         XCTAssertNil(container)
     }
+
+    func testConcurrentAccessToCurrentValueRelaySubscriptions() throws {
+        nonisolated(unsafe) let relay = try XCTUnwrap(relay)
+
+        DispatchQueue.concurrentPerform(iterations: 1000) { _ in
+            _ = relay.sink { _ in }
+        }
+    }
 }
 #endif