diff --git a/pgpainless-core/src/main/kotlin/org/pgpainless/signature/subpackets/BaseSignatureSubpackets.kt b/pgpainless-core/src/main/kotlin/org/pgpainless/signature/subpackets/BaseSignatureSubpackets.kt
index 89b2d232..89b18a38 100644
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/signature/subpackets/BaseSignatureSubpackets.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/signature/subpackets/BaseSignatureSubpackets.kt
@@ -6,6 +6,7 @@ package org.pgpainless.signature.subpackets
 
 import java.io.IOException
 import java.net.URL
+import java.time.Duration
 import java.util.*
 import openpgp.plusSeconds
 import org.bouncycastle.bcpg.sig.*
@@ -73,6 +74,14 @@ interface BaseSignatureSubpackets {
 
     fun setSignatureExpirationTime(isCritical: Boolean, seconds: Long): BaseSignatureSubpackets
 
+    fun setSignatureExpirationTime(
+        isCritical: Boolean,
+        duration: Duration
+    ): BaseSignatureSubpackets {
+        require(!duration.isNegative) { "Signature Expiration Time cannot be negative." }
+        return setSignatureExpirationTime(isCritical, duration.seconds)
+    }
+
     fun setSignatureExpirationTime(
         expirationTime: SignatureExpirationTime?
     ): BaseSignatureSubpackets
diff --git a/pgpainless-core/src/main/kotlin/org/pgpainless/signature/subpackets/SelfSignatureSubpackets.kt b/pgpainless-core/src/main/kotlin/org/pgpainless/signature/subpackets/SelfSignatureSubpackets.kt
index d41f76be..43f61435 100644
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/signature/subpackets/SelfSignatureSubpackets.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/signature/subpackets/SelfSignatureSubpackets.kt
@@ -4,6 +4,7 @@
 
 package org.pgpainless.signature.subpackets
 
+import java.time.Duration
 import java.util.*
 import openpgp.plusSeconds
 import org.bouncycastle.bcpg.sig.Features
@@ -74,6 +75,11 @@ interface SelfSignatureSubpackets : BaseSignatureSubpackets {
         secondsFromCreationToExpiration: Long
     ): SelfSignatureSubpackets
 
+    fun setKeyExpirationTime(isCritical: Boolean, duration: Duration): SelfSignatureSubpackets {
+        require(!duration.isNegative) { "Key Expiration Time cannot be negative." }
+        return setKeyExpirationTime(isCritical, duration.seconds)
+    }
+
     fun setKeyExpirationTime(keyExpirationTime: KeyExpirationTime?): SelfSignatureSubpackets
 
     fun getKeyExpirationTime(keyCreationTime: Date): Date? =
diff --git a/pgpainless-core/src/test/java/org/pgpainless/signature/subpackets/SignatureSubpacketsTest.java b/pgpainless-core/src/test/java/org/pgpainless/signature/subpackets/SignatureSubpacketsTest.java
index 14eed4de..3cf9cce6 100644
--- a/pgpainless-core/src/test/java/org/pgpainless/signature/subpackets/SignatureSubpacketsTest.java
+++ b/pgpainless-core/src/test/java/org/pgpainless/signature/subpackets/SignatureSubpacketsTest.java
@@ -13,10 +13,13 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.io.IOException;
+import java.time.Duration;
+import java.time.temporal.ChronoUnit;
 import java.util.Date;
 import java.util.Iterator;
 import java.util.Random;
 
+import kotlin.Unit;
 import org.bouncycastle.bcpg.SignatureSubpacket;
 import org.bouncycastle.bcpg.SignatureSubpacketTags;
 import org.bouncycastle.bcpg.sig.Exportable;
@@ -533,4 +536,28 @@ public class SignatureSubpacketsTest {
         PreferredAlgorithms aeadAlgorithms = (PreferredAlgorithms) vector.getSubpacket(SignatureSubpacketTags.PREFERRED_AEAD_ALGORITHMS);
         assertArrayEquals(aead.getPreferences(), aeadAlgorithms.getPreferences());
     }
+
+    @Test
+    public void keyExpirationWithNegativeDurationFails() {
+        assertThrows(IllegalArgumentException.class, () ->
+                SelfSignatureSubpackets.applyHashed(
+                        hashed -> {
+                            hashed.setKeyExpirationTime(true, Duration.of(-1, ChronoUnit.DAYS));
+                            return Unit.INSTANCE;
+                        }
+                ).modifyHashedSubpackets(new SignatureSubpackets())
+        );
+    }
+
+    @Test
+    public void signatureExpirationWithNegativeDurationFails() {
+        assertThrows(IllegalArgumentException.class, () ->
+                SelfSignatureSubpackets.applyHashed(
+                        hashed -> {
+                            hashed.setSignatureExpirationTime(true, Duration.of(-1, ChronoUnit.DAYS));
+                            return Unit.INSTANCE;
+                        }
+                ).modifyHashedSubpackets(new SignatureSubpackets())
+        );
+    }
 }