diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/io/TeeOutputStreamTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/io/TeeOutputStreamTest.java
new file mode 100644
index 000000000..bb1c97445
--- /dev/null
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/io/TeeOutputStreamTest.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2020, Michael Dardis. and others
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Distribution License v. 1.0 which is available at
+ * https://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+package org.eclipse.jgit.util.io;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+import org.eclipse.jgit.lib.Constants;
+import org.junit.Test;
+
+public class TeeOutputStreamTest {
+
+	@Test
+	public void test() throws IOException {
+		byte[] data = Constants.encode("Hello World");
+
+		TestOutput first = new TestOutput();
+		TestOutput second = new TestOutput();
+		try (TeeOutputStream tee = new TeeOutputStream(first, second)) {
+			tee.write(data);
+			assertArrayEquals("Stream output must match", first.toByteArray(),
+					second.toByteArray());
+
+			tee.write(1);
+			assertArrayEquals("Stream output must match", first.toByteArray(),
+					second.toByteArray());
+
+			tee.write(data, 1, 4); // Test partial write methods
+			assertArrayEquals("Stream output must match", first.toByteArray(),
+					second.toByteArray());
+		}
+		assertTrue("First stream should be closed", first.closed);
+		assertTrue("Second stream should be closed", second.closed);
+	}
+
+	@Test
+	public void testCloseException() {
+		TestOutput first = new TestOutput() {
+			@Override
+			public void close() throws IOException {
+				throw new IOException();
+			}
+
+		};
+		TestOutput second = new TestOutput();
+
+		@SuppressWarnings("resource")
+		TeeOutputStream tee = new TeeOutputStream(first, second);
+		try {
+			tee.close();
+		} catch (IOException ex) {
+			// Expected from first closed
+		}
+		assertFalse("First stream should not be closed", first.closed);
+		assertTrue("Second stream should still be closed if first close failed",
+				second.closed);
+	}
+
+	private static class TestOutput extends ByteArrayOutputStream {
+
+		private boolean closed;
+
+		@Override
+		public void close() throws IOException {
+			closed = true;
+			super.close();
+		}
+	}
+
+}
diff --git a/org.eclipse.jgit/META-INF/MANIFEST.MF b/org.eclipse.jgit/META-INF/MANIFEST.MF
index 1fd25780d..dbf122ef9 100644
--- a/org.eclipse.jgit/META-INF/MANIFEST.MF
+++ b/org.eclipse.jgit/META-INF/MANIFEST.MF
@@ -172,7 +172,6 @@ Import-Package: com.googlecode.javaewah;version="[1.1.6,2.0.0)",
  org.bouncycastle.openpgp.operator;version="[1.61.0,2.0.0)",
  org.bouncycastle.openpgp.operator.jcajce;version="[1.61.0,2.0.0)",
  org.bouncycastle.util.encoders;version="[1.61.0,2.0.0)",
- org.bouncycastle.util.io;version="[1.61.0,2.0.0)",
  org.slf4j;version="[1.7.0,2.0.0)",
  org.xml.sax,
  org.xml.sax.helpers
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/hooks/GitHook.java b/org.eclipse.jgit/src/org/eclipse/jgit/hooks/GitHook.java
index ed9c38a4d..4059b16b3 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/hooks/GitHook.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/hooks/GitHook.java
@@ -17,11 +17,11 @@
 import java.io.UnsupportedEncodingException;
 import java.util.concurrent.Callable;
 
-import org.bouncycastle.util.io.TeeOutputStream;
 import org.eclipse.jgit.api.errors.AbortedByHookException;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.util.FS;
 import org.eclipse.jgit.util.ProcessResult;
+import org.eclipse.jgit.util.io.TeeOutputStream;
 
 /**
  * Git can fire off custom scripts when certain important actions occur. These
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/util/io/TeeOutputStream.java b/org.eclipse.jgit/src/org/eclipse/jgit/util/io/TeeOutputStream.java
new file mode 100644
index 000000000..e6fdd709b
--- /dev/null
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/util/io/TeeOutputStream.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2020, Michael Dardis. and others
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Distribution License v. 1.0 which is available at
+ * https://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+package org.eclipse.jgit.util.io;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+/**
+ * An output stream that writes all data to two streams.
+ *
+ * @since 5.7
+ */
+public class TeeOutputStream extends OutputStream {
+
+	private final OutputStream stream1;
+	private final OutputStream stream2;
+
+	/**
+	 * Initialize a tee output stream.
+	 *
+	 * @param stream1 first output stream
+	 * @param stream2 second output stream
+	 */
+	public TeeOutputStream(OutputStream stream1, OutputStream stream2) {
+		this.stream1 = stream1;
+		this.stream2 = stream2;
+	}
+
+	/** {@inheritDoc} */
+	@Override
+	public void write(byte[] buf) throws IOException {
+		this.stream1.write(buf);
+		this.stream2.write(buf);
+	}
+
+	/** {@inheritDoc} */
+	@Override
+	public void write(byte[] buf, int off, int len) throws IOException {
+		this.stream1.write(buf, off, len);
+		this.stream2.write(buf, off, len);
+	}
+
+	/** {@inheritDoc} */
+	@Override
+	public void write(int b) throws IOException {
+		this.stream1.write(b);
+		this.stream2.write(b);
+	}
+
+	/** {@inheritDoc} */
+	@Override
+	public void flush() throws IOException {
+		this.stream1.flush();
+		this.stream2.flush();
+	}
+
+	/** {@inheritDoc} */
+	@Override
+	public void close() throws IOException {
+		try {
+			this.stream1.close();
+		} finally {
+			this.stream2.close();
+		}
+	}
+}