diff --git a/src/main/java/io/jenkins/plugins/credentials/gcp/secretsmanager/CredentialsFactory.java b/src/main/java/io/jenkins/plugins/credentials/gcp/secretsmanager/CredentialsFactory.java
index 4462fdd..a68b08b 100644
--- a/src/main/java/io/jenkins/plugins/credentials/gcp/secretsmanager/CredentialsFactory.java
+++ b/src/main/java/io/jenkins/plugins/credentials/gcp/secretsmanager/CredentialsFactory.java
@@ -3,6 +3,7 @@
 import com.cloudbees.plugins.credentials.SecretBytes;
 import com.cloudbees.plugins.credentials.common.StandardCredentials;
 import hudson.util.Secret;
+import java.io.Serializable;
 import java.util.Map;
 import java.util.Optional;
 import java.util.function.Supplier;
@@ -41,7 +42,9 @@ public static Optional<StandardCredentials> create(
     }
   }
 
-  private static class SecretBytesSupplier implements Supplier<SecretBytes> {
+  private static class SecretBytesSupplier implements Supplier<SecretBytes>, Serializable {
+
+    private static final long serialVersionUID = 1L;
 
     private final String id;
     private final transient SecretGetter secretGetter;
@@ -57,7 +60,9 @@ public SecretBytes get() {
     }
   }
 
-  private static class SecretSupplier implements Supplier<Secret> {
+  private static class SecretSupplier implements Supplier<Secret>, Serializable {
+
+    private static final long serialVersionUID = 1L;
 
     private final String id;
     private final transient SecretGetter secretGetter;