diff --git a/dropwizard-util/src/main/java/io/dropwizard/util/DataSize.java b/dropwizard-util/src/main/java/io/dropwizard/util/DataSize.java
index c375ee9bbb..d6fc86f149 100644
--- a/dropwizard-util/src/main/java/io/dropwizard/util/DataSize.java
+++ b/dropwizard-util/src/main/java/io/dropwizard/util/DataSize.java
@@ -3,6 +3,7 @@
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
 
+import java.io.Serializable;
 import java.util.Collections;
 import java.util.Locale;
 import java.util.SortedMap;
@@ -19,9 +20,10 @@
  * @see DataSizeUnit
  * @since 2.0
  */
-public class DataSize implements Comparable<DataSize> {
-    private static final Pattern SIZE_PATTERN = Pattern.compile("(\\d+)\\s*(\\S*)");
+public class DataSize implements Comparable<DataSize>, Serializable {
+    private static final long serialVersionUID = 8517642678733072800L;
 
+    private static final Pattern SIZE_PATTERN = Pattern.compile("(\\d+)\\s*(\\S*)");
     private static final SortedMap<String, DataSizeUnit> SUFFIXES;
 
     static {
diff --git a/dropwizard-util/src/main/java/io/dropwizard/util/Duration.java b/dropwizard-util/src/main/java/io/dropwizard/util/Duration.java
index 53ac4393b9..790c14d5b3 100644
--- a/dropwizard-util/src/main/java/io/dropwizard/util/Duration.java
+++ b/dropwizard-util/src/main/java/io/dropwizard/util/Duration.java
@@ -3,6 +3,7 @@
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
 
+import java.io.Serializable;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Locale;
@@ -13,9 +14,10 @@
 
 import static java.util.Objects.requireNonNull;
 
-public class Duration implements Comparable<Duration> {
-    private static final Pattern DURATION_PATTERN = Pattern.compile("(\\d+)\\s*(\\S+)");
+public class Duration implements Comparable<Duration>, Serializable {
+    private static final long serialVersionUID = 1445611723318059801L;
 
+    private static final Pattern DURATION_PATTERN = Pattern.compile("(\\d+)\\s*(\\S+)");
     private static final Map<String, TimeUnit> SUFFIXES;
 
     static {
diff --git a/dropwizard-util/src/main/java/io/dropwizard/util/Size.java b/dropwizard-util/src/main/java/io/dropwizard/util/Size.java
index e0a996d98a..cf37a65cea 100644
--- a/dropwizard-util/src/main/java/io/dropwizard/util/Size.java
+++ b/dropwizard-util/src/main/java/io/dropwizard/util/Size.java
@@ -3,6 +3,7 @@
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
 
+import java.io.Serializable;
 import java.util.Collections;
 import java.util.Locale;
 import java.util.SortedMap;
@@ -16,9 +17,10 @@
  * @deprecated Use {@link DataSize} for correct SI and IEC prefixes.
  */
 @Deprecated
-public class Size implements Comparable<Size> {
-    private static final Pattern SIZE_PATTERN = Pattern.compile("(\\d+)\\s*(\\S+)");
+public class Size implements Comparable<Size>, Serializable {
+    private static final long serialVersionUID = 6790991929249604526L;
 
+    private static final Pattern SIZE_PATTERN = Pattern.compile("(\\d+)\\s*(\\S+)");
     private static final SortedMap<String, SizeUnit> SUFFIXES;
 
     static {
diff --git a/dropwizard-util/src/test/java/io/dropwizard/util/DataSizeTest.java b/dropwizard-util/src/test/java/io/dropwizard/util/DataSizeTest.java
index e6bf37d059..be84fb155e 100644
--- a/dropwizard-util/src/test/java/io/dropwizard/util/DataSizeTest.java
+++ b/dropwizard-util/src/test/java/io/dropwizard/util/DataSizeTest.java
@@ -3,7 +3,11 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.jupiter.api.Test;
 
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
@@ -693,4 +697,23 @@ void testFromSize() {
         assertThat(DataSize.fromSize(Size.gigabytes(5L))).isEqualTo(DataSize.gibibytes(5L));
         assertThat(DataSize.fromSize(Size.terabytes(5L))).isEqualTo(DataSize.tebibytes(5L));
     }
+
+    @Test
+    void testSerialization() throws IOException, ClassNotFoundException {
+        final DataSize size = DataSize.kibibytes(42L);
+        final byte[] bytes;
+        try (final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+             final ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream)) {
+            objectOutputStream.writeObject(size);
+            bytes = outputStream.toByteArray();
+        }
+
+        try (final ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
+             final ObjectInputStream objectInputStream = new ObjectInputStream(inputStream)) {
+            final Object o = objectInputStream.readObject();
+            assertThat(o)
+                    .isInstanceOf(DataSize.class)
+                    .isEqualTo(size);
+        }
+    }
 }
\ No newline at end of file
diff --git a/dropwizard-util/src/test/java/io/dropwizard/util/DurationTest.java b/dropwizard-util/src/test/java/io/dropwizard/util/DurationTest.java
index c94ebee1f5..5b65cb1c5c 100644
--- a/dropwizard-util/src/test/java/io/dropwizard/util/DurationTest.java
+++ b/dropwizard-util/src/test/java/io/dropwizard/util/DurationTest.java
@@ -3,7 +3,11 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.jupiter.api.Test;
 
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
 import java.util.concurrent.TimeUnit;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -864,4 +868,23 @@ public void deserializesCorrectlyWithJackson() throws IOException {
         assertThat(mapper.readValue("\"1 day\"", Duration.class)).isEqualTo(Duration.days(1L));
         assertThat(mapper.readValue("\"2 days\"", Duration.class)).isEqualTo(Duration.days(2L));
     }
+
+    @Test
+    void testSerialization() throws IOException, ClassNotFoundException {
+        final Duration duration = Duration.minutes(42L);
+        final byte[] bytes;
+        try (final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+             final ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream)) {
+            objectOutputStream.writeObject(duration);
+            bytes = outputStream.toByteArray();
+        }
+
+        try (final ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
+             final ObjectInputStream objectInputStream = new ObjectInputStream(inputStream)) {
+            final Object o = objectInputStream.readObject();
+            assertThat(o)
+                    .isInstanceOf(Duration.class)
+                    .isEqualTo(duration);
+        }
+    }
 }
diff --git a/dropwizard-util/src/test/java/io/dropwizard/util/SizeTest.java b/dropwizard-util/src/test/java/io/dropwizard/util/SizeTest.java
index 96a4eef24a..da8be5c535 100644
--- a/dropwizard-util/src/test/java/io/dropwizard/util/SizeTest.java
+++ b/dropwizard-util/src/test/java/io/dropwizard/util/SizeTest.java
@@ -3,7 +3,11 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.jupiter.api.Test;
 
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
@@ -585,4 +589,23 @@ void testToDataSize() {
         assertThat(Size.gigabytes(5L).toDataSize()).isEqualTo(DataSize.gibibytes(5L));
         assertThat(Size.terabytes(5L).toDataSize()).isEqualTo(DataSize.tebibytes(5L));
     }
+
+    @Test
+    void testSerialization() throws IOException, ClassNotFoundException {
+        final Size size = Size.megabytes(42L);
+        final byte[] bytes;
+        try (final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+             final ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream)) {
+            objectOutputStream.writeObject(size);
+            bytes = outputStream.toByteArray();
+        }
+
+        try (final ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
+             final ObjectInputStream objectInputStream = new ObjectInputStream(inputStream)) {
+            final Object o = objectInputStream.readObject();
+            assertThat(o)
+                    .isInstanceOf(Size.class)
+                    .isEqualTo(size);
+        }
+    }
 }