diff --git a/ArchiSteamFarm/Collections/ConcurrentHashSet.cs b/ArchiSteamFarm/Collections/ConcurrentHashSet.cs
index b859f6ba9..15c3153c5 100644
--- a/ArchiSteamFarm/Collections/ConcurrentHashSet.cs
+++ b/ArchiSteamFarm/Collections/ConcurrentHashSet.cs
@@ -105,6 +105,7 @@ public sealed class ConcurrentHashSet<T> : IReadOnlySet<T>, ISet<T> where T : no
 		}
 	}
 
+	[MustDisposeResource]
 	public IEnumerator<T> GetEnumerator() => BackingCollection.Keys.GetEnumerator();
 
 	public void IntersectWith(IEnumerable<T> other) {
diff --git a/ArchiSteamFarm/Collections/FixedSizeConcurrentQueue.cs b/ArchiSteamFarm/Collections/FixedSizeConcurrentQueue.cs
index fe4d28aa4..3e713ac53 100644
--- a/ArchiSteamFarm/Collections/FixedSizeConcurrentQueue.cs
+++ b/ArchiSteamFarm/Collections/FixedSizeConcurrentQueue.cs
@@ -25,6 +25,7 @@ using System;
 using System.Collections;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
+using JetBrains.Annotations;
 
 namespace ArchiSteamFarm.Collections;
 
@@ -51,7 +52,9 @@ internal sealed class FixedSizeConcurrentQueue<T> : IEnumerable<T> where T : not
 		MaxCount = maxCount;
 	}
 
+	[MustDisposeResource]
 	public IEnumerator<T> GetEnumerator() => BackingQueue.GetEnumerator();
+
 	IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
 
 	internal void Enqueue(T obj) {
diff --git a/ArchiSteamFarm/Collections/ObservableConcurrentDictionary.cs b/ArchiSteamFarm/Collections/ObservableConcurrentDictionary.cs
index b962c905d..322e3857e 100644
--- a/ArchiSteamFarm/Collections/ObservableConcurrentDictionary.cs
+++ b/ArchiSteamFarm/Collections/ObservableConcurrentDictionary.cs
@@ -124,6 +124,7 @@ public sealed class ObservableConcurrentDictionary<TKey, TValue> : IDictionary<T
 		((ICollection<KeyValuePair<TKey, TValue>>) BackingDictionary).CopyTo(array, arrayIndex);
 	}
 
+	[MustDisposeResource]
 	public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator() => BackingDictionary.GetEnumerator();
 
 	public bool Remove(KeyValuePair<TKey, TValue> item) {