diff --git a/src/main/java/util/URITools.java b/src/main/java/util/URITools.java
index a377f04b..fd2d8647 100644
--- a/src/main/java/util/URITools.java
+++ b/src/main/java/util/URITools.java
@@ -252,12 +252,16 @@ else if ( URITools.isS3( xmlURI ) || URITools.isGC( xmlURI ) )
 
 	public static N5Writer instantiateN5Writer( final StorageFormat format, final URI uri )
 	{
+		final GsonBuilder builder = new GsonBuilder().registerTypeAdapter(
+				CoordinateTransformation.class,
+				new CoordinateTransformationAdapter() );
+
 		if ( URITools.isFile( uri ) )
 		{
 			if ( format.equals( StorageFormat.N5 ))
 				return new N5FSWriter( URITools.fromURI( uri ) );
 			else if ( format.equals( StorageFormat.ZARR ))
-				return new N5ZarrWriter( URITools.fromURI( uri ) );
+				return new N5ZarrWriter( URITools.fromURI( uri ), builder );
 			else if ( format.equals( StorageFormat.HDF5 ))
 				return new N5HDF5Writer( URITools.fromURI( uri ) );
 			else
@@ -267,10 +271,6 @@ else if ( format.equals( StorageFormat.HDF5 ))
 		{
 			N5Writer n5w;
 
-			final GsonBuilder builder = new GsonBuilder().registerTypeAdapter(
-					CoordinateTransformation.class,
-					new CoordinateTransformationAdapter() );
-
 			try
 			{
 				//System.out.println( "Trying writing with credentials ..." );
@@ -294,12 +294,16 @@ else if ( format.equals( StorageFormat.HDF5 ))
 
 	public static N5Reader instantiateN5Reader( final StorageFormat format, final URI uri )
 	{
+		final GsonBuilder builder = new GsonBuilder().registerTypeAdapter(
+				CoordinateTransformation.class,
+				new CoordinateTransformationAdapter() );
+
 		if ( URITools.isFile( uri ) )
 		{
 			if ( format.equals( StorageFormat.N5 ))
 				return new N5FSReader( URITools.fromURI( uri ) );
 			else if ( format.equals( StorageFormat.ZARR ))
-				return new N5ZarrReader( URITools.fromURI( uri ) );
+				return new N5ZarrReader( URITools.fromURI( uri ), builder );
 			else
 				throw new RuntimeException( "Format: " + format + " not supported." );
 		}
@@ -307,10 +311,6 @@ else if ( format.equals( StorageFormat.ZARR ))
 		{
 			N5Reader n5r;
 
-			final GsonBuilder builder = new GsonBuilder().registerTypeAdapter(
-					CoordinateTransformation.class,
-					new CoordinateTransformationAdapter() );
-
 			try
 			{
 				//System.out.println( "Trying reading with credentials ..." );