diff --git a/pom.xml b/pom.xml
index c882619a..3448ba28 100644
--- a/pom.xml
+++ b/pom.xml
@@ -102,7 +102,7 @@
         <dependency>
             <groupId>com.scalableminds</groupId>
             <artifactId>blosc-java</artifactId>
-            <version>0.1-1.21.4</version>
+            <version>0.3-1.21.6</version>
         </dependency>
         <dependency>
             <groupId>com.github.luben</groupId>
diff --git a/src/main/java/dev/zarr/zarrjava/store/BufferedZipStore.java b/src/main/java/dev/zarr/zarrjava/store/BufferedZipStore.java
index ab1afc8c..411bfa2d 100644
--- a/src/main/java/dev/zarr/zarrjava/store/BufferedZipStore.java
+++ b/src/main/java/dev/zarr/zarrjava/store/BufferedZipStore.java
@@ -80,7 +80,7 @@ public BufferedZipStore(@Nonnull StoreHandle underlyingStore) {
     }
 
     public BufferedZipStore(@Nonnull Path underlyingStore, String archiveComment) {
-        this(new FilesystemStore(underlyingStore.getParent()).resolve(underlyingStore.getFileName().toString()), archiveComment);
+        this(new FilesystemStore(underlyingStore.toAbsolutePath().getParent()).resolve(underlyingStore.getFileName().toString()), archiveComment);
     }
 
     public BufferedZipStore(@Nonnull Path underlyingStore) {
@@ -108,7 +108,7 @@ public BufferedZipStore(@Nonnull StoreHandle underlyingStore, boolean flushOnWri
     }
 
     public BufferedZipStore(@Nonnull Path underlyingStore, String archiveComment, boolean flushOnWrite) {
-        this(new FilesystemStore(underlyingStore.getParent()).resolve(underlyingStore.getFileName().toString()), archiveComment, flushOnWrite);
+        this(new FilesystemStore(underlyingStore.toAbsolutePath().getParent()).resolve(underlyingStore.getFileName().toString()), archiveComment, flushOnWrite);
     }
 
     public BufferedZipStore(@Nonnull Path underlyingStore, boolean flushOnWrite) {
diff --git a/src/main/java/dev/zarr/zarrjava/v2/ArrayMetadataBuilder.java b/src/main/java/dev/zarr/zarrjava/v2/ArrayMetadataBuilder.java
index c35acd3c..00c37687 100644
--- a/src/main/java/dev/zarr/zarrjava/v2/ArrayMetadataBuilder.java
+++ b/src/main/java/dev/zarr/zarrjava/v2/ArrayMetadataBuilder.java
@@ -93,9 +93,6 @@ public ArrayMetadataBuilder withBloscCompressor(
     }
 
     public ArrayMetadataBuilder withBloscCompressor(String cname, String shuffle, int clevel, int blockSize) {
-        if (shuffle.equals("shuffle")) {
-            shuffle = "byteshuffle";
-        }
         return withBloscCompressor(Blosc.Compressor.fromString(cname), Blosc.Shuffle.fromString(shuffle), clevel,
                 dataType.getByteCount(), blockSize
         );
diff --git a/src/main/java/dev/zarr/zarrjava/v3/codec/CodecBuilder.java b/src/main/java/dev/zarr/zarrjava/v3/codec/CodecBuilder.java
index d4eb697f..5c3487ce 100644
--- a/src/main/java/dev/zarr/zarrjava/v3/codec/CodecBuilder.java
+++ b/src/main/java/dev/zarr/zarrjava/v3/codec/CodecBuilder.java
@@ -38,9 +38,6 @@ public CodecBuilder withBlosc(
     }
 
     public CodecBuilder withBlosc(String cname, String shuffle, int clevel, int blockSize) {
-        if (shuffle.equals("shuffle")) {
-            shuffle = "byteshuffle";
-        }
         return withBlosc(Blosc.Compressor.fromString(cname), Blosc.Shuffle.fromString(shuffle), clevel,
                 dataType.getByteCount(), blockSize
         );
diff --git a/src/test/java/dev/zarr/zarrjava/store/BufferedZipStoreTest.java b/src/test/java/dev/zarr/zarrjava/store/BufferedZipStoreTest.java
index 742a18da..88ab1d65 100644
--- a/src/test/java/dev/zarr/zarrjava/store/BufferedZipStoreTest.java
+++ b/src/test/java/dev/zarr/zarrjava/store/BufferedZipStoreTest.java
@@ -15,6 +15,7 @@
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.zip.ZipEntry;
@@ -174,6 +175,21 @@ public void testZipStoreV2(boolean flushOnWrite) throws ZarrException, IOExcepti
     }
 
 
+    @Test
+    public void testBufferedZipStoreWithRelativePath() throws ZarrException, IOException {
+        // Path.of("filename.zip") has no parent component — getParent() returns null,
+        // which previously caused a NullPointerException in FilesystemStore.resolveKeys().
+        Path relPath = Paths.get("testRelativePath.zip");
+        Path absPath = relPath.toAbsolutePath();
+        try {
+            BufferedZipStore store = new BufferedZipStore(relPath);
+            writeTestGroupV3(store.resolve(), true);
+            store.flush();
+        } finally {
+            Files.deleteIfExists(absPath);
+        }
+    }
+
     @Override
     Store writableStore() {
         Path path = TESTOUTPUT.resolve("writableStore.ZIP");