diff --git a/build.gradle.kts b/build.gradle.kts
index 47b465b..fd9eb02 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -38,7 +38,7 @@ object Extras {
     // set for the project
     const val description = "Utilities for use within Java projects"
     const val group = "com.dorkbox"
-    const val version = "1.8"
+    const val version = "1.8.1"
 
     // set as project.ext
     const val name = "Utilities"
diff --git a/src/dorkbox/util/collections/ConcurrentEntry.java b/src/dorkbox/util/collections/ConcurrentEntry.java
index 22007dc..8163e89 100644
--- a/src/dorkbox/util/collections/ConcurrentEntry.java
+++ b/src/dorkbox/util/collections/ConcurrentEntry.java
@@ -27,8 +27,8 @@ public
 class ConcurrentEntry<T> {
     private final T value;
 
-    private ConcurrentEntry<T> next;
-    private ConcurrentEntry<T> prev;
+    private volatile ConcurrentEntry<T> next;
+    private volatile ConcurrentEntry<T> prev;
 
     public
     ConcurrentEntry(T value, ConcurrentEntry<T> next) {
@@ -55,7 +55,7 @@ class ConcurrentEntry<T> {
         // can not nullify references to help GC since running iterators might not see the entire set
         // if this element is their current element
         //next = null;
-        //predecessor = null;
+        //prev = null;
     }
 
     public