diff --git a/src/main/java/net/imglib2/cache/img/AbstractReadWriteCachedCellImgOptions.java b/src/main/java/net/imglib2/cache/img/AbstractReadWriteCachedCellImgOptions.java
index 2ee9211..ef95c26 100644
--- a/src/main/java/net/imglib2/cache/img/AbstractReadWriteCachedCellImgOptions.java
+++ b/src/main/java/net/imglib2/cache/img/AbstractReadWriteCachedCellImgOptions.java
@@ -51,7 +51,7 @@ public abstract class AbstractReadWriteCachedCellImgOptions {
 	/**
 	 * @return The values of the (derived) options object
 	 */
-	abstract Values values();
+	public abstract Values values();
 
 	/**
 	 * @param other Options that should be merged with this option object
diff --git a/src/main/java/net/imglib2/cache/img/DiskCachedCellImgOptions.java b/src/main/java/net/imglib2/cache/img/DiskCachedCellImgOptions.java
index 490d3db..e60c050 100644
--- a/src/main/java/net/imglib2/cache/img/DiskCachedCellImgOptions.java
+++ b/src/main/java/net/imglib2/cache/img/DiskCachedCellImgOptions.java
@@ -43,7 +43,7 @@
  */
 public class DiskCachedCellImgOptions extends AbstractReadWriteCachedCellImgOptions
 {
-	public final Values values;
+	private final Values values;
 
 	DiskCachedCellImgOptions(final Values values)
 	{
@@ -57,7 +57,7 @@ public DiskCachedCellImgOptions()
 	}
 
 	@Override
-	Values values() {
+	public Values values() {
 		return values;
 	}