diff --git a/ArchiSteamFarm/ArchiSteamFarm.csproj b/ArchiSteamFarm/ArchiSteamFarm.csproj
index ecc48e962..6ae56e07b 100644
--- a/ArchiSteamFarm/ArchiSteamFarm.csproj
+++ b/ArchiSteamFarm/ArchiSteamFarm.csproj
@@ -60,6 +60,7 @@
     <PackageReference Include="JetBrains.Annotations" Version="2020.1.0" />
     <PackageReference Include="Markdig.Signed" Version="0.18.3" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+    <PackageReference Include="Nito.AsyncEx.Coordination" Version="5.0.0" />
     <PackageReference Include="NLog" Version="4.7.0" />
     <PackageReference Include="NLog.Web.AspNetCore" Version="4.9.1" />
     <PackageReference Include="SteamKit2" Version="2.3.0-Beta.1" />
diff --git a/ArchiSteamFarm/Collections/ConcurrentEnumerator.cs b/ArchiSteamFarm/Collections/ConcurrentEnumerator.cs
index 8a4bbc06d..04e489291 100644
--- a/ArchiSteamFarm/Collections/ConcurrentEnumerator.cs
+++ b/ArchiSteamFarm/Collections/ConcurrentEnumerator.cs
@@ -22,7 +22,6 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
-using System.Threading;
 using JetBrains.Annotations;
 
 namespace ArchiSteamFarm.Collections {
@@ -30,24 +29,22 @@ namespace ArchiSteamFarm.Collections {
 		public T Current => Enumerator.Current;
 
 		private readonly IEnumerator<T> Enumerator;
-		private readonly ReaderWriterLockSlim Lock;
+		private readonly IDisposable Lock;
 
 		object IEnumerator.Current => Current;
 
-		internal ConcurrentEnumerator([NotNull] IReadOnlyCollection<T> collection, [NotNull] ReaderWriterLockSlim @lock) {
+		internal ConcurrentEnumerator([NotNull] IReadOnlyCollection<T> collection, [NotNull] IDisposable @lock) {
 			if ((collection == null) || (@lock == null)) {
 				throw new ArgumentNullException(nameof(collection) + " || " + nameof(@lock));
 			}
 
-			@lock.EnterReadLock();
-
 			Lock = @lock;
 			Enumerator = collection.GetEnumerator();
 		}
 
 		public void Dispose() {
 			Enumerator.Dispose();
-			Lock.ExitReadLock();
+			Lock.Dispose();
 		}
 
 		public bool MoveNext() => Enumerator.MoveNext();
diff --git a/ArchiSteamFarm/Collections/ConcurrentList.cs b/ArchiSteamFarm/Collections/ConcurrentList.cs
index 2303c97ed..ac2878955 100644
--- a/ArchiSteamFarm/Collections/ConcurrentList.cs
+++ b/ArchiSteamFarm/Collections/ConcurrentList.cs
@@ -22,7 +22,7 @@
 using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
-using System.Threading;
+using Nito.AsyncEx;
 
 namespace ArchiSteamFarm.Collections {
 	internal sealed class ConcurrentList<T> : IList<T>, IReadOnlyList<T> {
@@ -30,125 +30,81 @@ namespace ArchiSteamFarm.Collections {
 
 		internal int Count {
 			get {
-				Lock.EnterReadLock();
-
-				try {
+				using (Lock.ReaderLock()) {
 					return BackingCollection.Count;
-				} finally {
-					Lock.ExitReadLock();
 				}
 			}
 		}
 
 		private readonly List<T> BackingCollection = new List<T>();
-		private readonly ReaderWriterLockSlim Lock = new ReaderWriterLockSlim();
+		private readonly AsyncReaderWriterLock Lock = new AsyncReaderWriterLock();
 
 		int ICollection<T>.Count => Count;
 		int IReadOnlyCollection<T>.Count => Count;
 
 		public T this[int index] {
 			get {
-				Lock.EnterReadLock();
-
-				try {
+				using (Lock.ReaderLock()) {
 					return BackingCollection[index];
-				} finally {
-					Lock.ExitReadLock();
 				}
 			}
 
 			set {
-				Lock.EnterWriteLock();
-
-				try {
+				using (Lock.WriterLock()) {
 					BackingCollection[index] = value;
-				} finally {
-					Lock.ExitWriteLock();
 				}
 			}
 		}
 
 		public void Add(T item) {
-			Lock.EnterWriteLock();
-
-			try {
+			using (Lock.WriterLock()) {
 				BackingCollection.Add(item);
-			} finally {
-				Lock.ExitWriteLock();
 			}
 		}
 
 		public void Clear() {
-			Lock.EnterWriteLock();
-
-			try {
+			using (Lock.WriterLock()) {
 				BackingCollection.Clear();
-			} finally {
-				Lock.ExitWriteLock();
 			}
 		}
 
 		public bool Contains(T item) {
-			Lock.EnterReadLock();
-
-			try {
+			using (Lock.ReaderLock()) {
 				return BackingCollection.Contains(item);
-			} finally {
-				Lock.ExitReadLock();
 			}
 		}
 
 		public void CopyTo(T[] array, int arrayIndex) {
-			Lock.EnterReadLock();
-
-			try {
+			using (Lock.ReaderLock()) {
 				BackingCollection.CopyTo(array, arrayIndex);
-			} finally {
-				Lock.ExitReadLock();
 			}
 		}
 
 		[JetBrains.Annotations.NotNull]
 		[SuppressMessage("ReSharper", "AnnotationRedundancyInHierarchy")]
-		public IEnumerator<T> GetEnumerator() => new ConcurrentEnumerator<T>(BackingCollection, Lock);
+		public IEnumerator<T> GetEnumerator() => new ConcurrentEnumerator<T>(BackingCollection, Lock.ReaderLock());
 
 		public int IndexOf(T item) {
-			Lock.EnterReadLock();
-
-			try {
+			using (Lock.ReaderLock()) {
 				return BackingCollection.IndexOf(item);
-			} finally {
-				Lock.ExitReadLock();
 			}
 		}
 
 		public void Insert(int index, T item) {
-			Lock.EnterWriteLock();
-
-			try {
+			using (Lock.WriterLock()) {
 				BackingCollection.Insert(index, item);
-			} finally {
-				Lock.ExitWriteLock();
 			}
 		}
 
 		public bool Remove(T item) {
-			Lock.EnterWriteLock();
-
-			try {
+			using (Lock.WriterLock()) {
 				return BackingCollection.Remove(item);
-			} finally {
-				Lock.ExitWriteLock();
 			}
 		}
 
 		public void RemoveAt(int index) {
-			Lock.EnterWriteLock();
-
-			try {
+			using (Lock.WriterLock()) {
 				BackingCollection.RemoveAt(index);
-			} finally {
-				Lock.ExitWriteLock();
 			}
 		}
 
@@ -157,13 +113,9 @@ namespace ArchiSteamFarm.Collections {
 		IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
 
 		internal void ReplaceWith([JetBrains.Annotations.NotNull] IEnumerable<T> collection) {
-			Lock.EnterWriteLock();
-
-			try {
+			using (Lock.WriterLock()) {
 				BackingCollection.Clear();
 				BackingCollection.AddRange(collection);
-			} finally {
-				Lock.ExitWriteLock();
 			}
 		}
 	}