diff --git a/src/main/java/com/commercetools/sync/commons/utils/CaffeineReferenceIdToKeyCacheImpl.java b/src/main/java/com/commercetools/sync/commons/utils/CaffeineReferenceIdToKeyCacheImpl.java
index a9f1c7f5f..0e723644d 100644
--- a/src/main/java/com/commercetools/sync/commons/utils/CaffeineReferenceIdToKeyCacheImpl.java
+++ b/src/main/java/com/commercetools/sync/commons/utils/CaffeineReferenceIdToKeyCacheImpl.java
@@ -16,7 +16,7 @@
  */
 public class CaffeineReferenceIdToKeyCacheImpl implements ReferenceIdToKeyCache {
   private static final Cache<String, String> referenceIdToKeyCache =
-      Caffeine.newBuilder().maximumSize(10_000).executor(Runnable::run).build();
+      Caffeine.newBuilder().maximumSize(1_000_000).executor(Runnable::run).build();
 
   public CaffeineReferenceIdToKeyCacheImpl() {}