diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac04eb1a5..5337bd04b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -42,6 +42,7 @@ All notable changes to this project will be documented in this file.
 - [#1938] AS3 - initproperty compound operators, increment/decrement
 - [#1938] "Open loaded during play" Loader injection for Multiname types
 - AS3 - not using visitCode when not needed => faster decompilation
+- Cache thread as daemon
  
 ## [18.3.2] - 2023-01-10
 ### Removed
diff --git a/libsrc/ffdec_lib/src/com/jpexs/helpers/Cache.java b/libsrc/ffdec_lib/src/com/jpexs/helpers/Cache.java
index 213945e06..96fa7ded5 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/helpers/Cache.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/helpers/Cache.java
@@ -56,7 +56,7 @@ public class Cache<K, V> implements Freed {
             
     private static final long CLEAN_INTERVAL = 5 * 1000; //5 seconds
     
-    private static Thread oldCleaner = null;
+    private static Thread oldCleaner = null;  
 
     static {
         Runtime.getRuntime().addShutdownHook(new Thread() {
@@ -90,6 +90,7 @@ public class Cache<K, V> implements Freed {
                     }
                 }                
             };
+            oldCleaner.setDaemon(true);
             oldCleaner.setPriority(Thread.MIN_PRIORITY);
             oldCleaner.start();
         }