diff --git a/source/net/filebot/cli/ScriptBundle.java b/source/net/filebot/cli/ScriptBundle.java
index b7ba12e8..b3278476 100644
--- a/source/net/filebot/cli/ScriptBundle.java
+++ b/source/net/filebot/cli/ScriptBundle.java
@@ -10,7 +10,6 @@ import java.io.InputStream;
 import java.security.cert.Certificate;
 import java.security.cert.CertificateException;
 import java.security.cert.CertificateFactory;
-import java.util.Arrays;
 import java.util.Map;
 import java.util.jar.JarEntry;
 import java.util.jar.JarInputStream;
@@ -36,7 +35,7 @@ public class ScriptBundle implements ScriptProvider {
 					continue;
 
 				// completely read and verify current jar entry
-				ByteBufferOutputStream buffer = new ByteBufferOutputStream(f.getSize());
+				ByteBufferOutputStream buffer = new ByteBufferOutputStream(f.getSize() > 0 ? f.getSize() : 8192);
 				buffer.transferFully(jar);
 
 				jar.closeEntry();
@@ -45,7 +44,7 @@ public class ScriptBundle implements ScriptProvider {
 				Certificate[] certificates = f.getCertificates();
 
 				if (certificates == null || stream(f.getCertificates()).noneMatch(certificate::equals)) {
-					throw new SecurityException(String.format("BAD certificate: %s", Arrays.toString(certificates)));
+					throw new SecurityException("BAD certificate: " + asList(certificates));
 				}
 
 				return UTF_8.decode(buffer.getByteBuffer()).toString();
diff --git a/source/net/filebot/util/ByteBufferOutputStream.java b/source/net/filebot/util/ByteBufferOutputStream.java
index 18d1d4e7..5b691bef 100644
--- a/source/net/filebot/util/ByteBufferOutputStream.java
+++ b/source/net/filebot/util/ByteBufferOutputStream.java
@@ -14,7 +14,7 @@ public class ByteBufferOutputStream extends OutputStream {
 	private final float loadFactor;
 
 	public ByteBufferOutputStream(long initialCapacity) {
-		this((int) initialCapacity);
+		this((int) initialCapacity, 1.0f);
 	}
 
 	public ByteBufferOutputStream(int initialCapacity) {
@@ -23,10 +23,10 @@ public class ByteBufferOutputStream extends OutputStream {
 
 	public ByteBufferOutputStream(int initialCapacity, float loadFactor) {
 		if (initialCapacity < 0)
-			throw new IllegalArgumentException("initialCapacity must not be negative");
+			throw new IllegalArgumentException("initialCapacity must not be negative: " + initialCapacity);
 
 		if (loadFactor <= 0 || Float.isNaN(loadFactor))
-			throw new IllegalArgumentException("loadFactor must be greater than 0");
+			throw new IllegalArgumentException("loadFactor must be greater than zero: " + loadFactor);
 
 		this.buffer = ByteBuffer.allocate(initialCapacity + 1);
 		this.loadFactor = loadFactor;