diff --git a/context-propagation-core/src/main/java/nl/talsmasoftware/context/core/ContextManagers.java b/context-propagation-core/src/main/java/nl/talsmasoftware/context/core/ContextManagers.java
index e47e56b6..56f38456 100644
--- a/context-propagation-core/src/main/java/nl/talsmasoftware/context/core/ContextManagers.java
+++ b/context-propagation-core/src/main/java/nl/talsmasoftware/context/core/ContextManagers.java
@@ -62,7 +62,7 @@ private ContextManagers() {
     @SuppressWarnings("rawtypes")
     public static nl.talsmasoftware.context.api.ContextSnapshot createContextSnapshot() {
         final long start = System.nanoTime();
-        final List<ContextManager> managers = ServiceCache.cached(ContextManager.class);
+        final List<ContextManager> managers = ServiceCache.cached(ContextManager.class); // Cached list is immutable
         final Object[] values = new Object[managers.size()];
 
         for (ListIterator<ContextManager> it = managers.listIterator(); it.hasNext(); ) {