diff --git a/pom.xml b/pom.xml
index f8d66cf..7992271 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 
     <groupId>io.digitalstate.stix</groupId>
     <artifactId>stix</artifactId>
-    <version>v0.5.3</version>
+    <version>v0.5.4</version>
     <packaging>jar</packaging>
 
     <name>STIX 2</name>
diff --git a/src/main/java/io/digitalstate/stix/bundle/BundleObject.java b/src/main/java/io/digitalstate/stix/bundle/BundleObject.java
index 9214e17..f1e9234 100644
--- a/src/main/java/io/digitalstate/stix/bundle/BundleObject.java
+++ b/src/main/java/io/digitalstate/stix/bundle/BundleObject.java
@@ -28,8 +28,7 @@
 @DefaultTypeValue(value = "bundle", groups = {DefaultValuesProcessor.class})
 @JsonTypeName("bundle")
 @Value.Style(typeImmutable = "Bundle", validationMethod = Value.Style.ValidationMethod.NONE, additionalJsonAnnotations = {JsonTypeName.class})
-@JsonSerialize(as = Bundle.class)
-@JsonDeserialize(builder = Bundle.Builder.class)
+@JsonSerialize(as = Bundle.class) @JsonDeserialize(builder = Bundle.Builder.class)
 @JsonPropertyOrder({"type", "id", "spec_version", "objects"})
 public interface BundleObject extends GenericValidation, Serializable {
 
diff --git a/src/main/java/io/digitalstate/stix/common/StixCommonProperties.java b/src/main/java/io/digitalstate/stix/common/StixCommonProperties.java
index aaf5f12..4093955 100644
--- a/src/main/java/io/digitalstate/stix/common/StixCommonProperties.java
+++ b/src/main/java/io/digitalstate/stix/common/StixCommonProperties.java
@@ -72,7 +72,6 @@ default boolean getHydrated(){
     Optional<IdentitySdo> getCreatedByRef();
 
     @NotNull
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(shape=JsonFormat.Shape.STRING, pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @JsonProperty("created")
     @Value.Default
diff --git a/src/main/java/io/digitalstate/stix/common/StixModified.java b/src/main/java/io/digitalstate/stix/common/StixModified.java
index 7c8da0b..d925d8b 100644
--- a/src/main/java/io/digitalstate/stix/common/StixModified.java
+++ b/src/main/java/io/digitalstate/stix/common/StixModified.java
@@ -19,7 +19,6 @@ public interface StixModified {
 
     @NotNull
     @JsonProperty("modified")
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @Value.Default
     @Redactable
diff --git a/src/main/java/io/digitalstate/stix/sdo/objects/CampaignSdo.java b/src/main/java/io/digitalstate/stix/sdo/objects/CampaignSdo.java
index dd40ebe..3b09b37 100644
--- a/src/main/java/io/digitalstate/stix/sdo/objects/CampaignSdo.java
+++ b/src/main/java/io/digitalstate/stix/sdo/objects/CampaignSdo.java
@@ -46,13 +46,11 @@ public interface CampaignSdo extends DomainObject {
     @Redactable
     Set<String> getAliases();
 
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @JsonProperty("first_seen") @JsonInclude(value = NON_EMPTY, content= NON_EMPTY)
     @Redactable
     Optional<Instant> getFirstSeen();
 
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @JsonProperty("last_seen") @JsonInclude(value = NON_EMPTY, content= NON_EMPTY)
     @Redactable
diff --git a/src/main/java/io/digitalstate/stix/sdo/objects/IndicatorSdo.java b/src/main/java/io/digitalstate/stix/sdo/objects/IndicatorSdo.java
index e3daacb..bd28d2c 100644
--- a/src/main/java/io/digitalstate/stix/sdo/objects/IndicatorSdo.java
+++ b/src/main/java/io/digitalstate/stix/sdo/objects/IndicatorSdo.java
@@ -65,7 +65,6 @@ public interface IndicatorSdo extends DomainObject {
     Instant getValidFrom();
 
     @JsonProperty("valid_until") @JsonInclude(value = NON_EMPTY, content= NON_EMPTY)
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @Redactable
     Optional<Instant> getValidUntil();
diff --git a/src/main/java/io/digitalstate/stix/sdo/objects/IntrusionSetSdo.java b/src/main/java/io/digitalstate/stix/sdo/objects/IntrusionSetSdo.java
index 80fd907..724bc9c 100644
--- a/src/main/java/io/digitalstate/stix/sdo/objects/IntrusionSetSdo.java
+++ b/src/main/java/io/digitalstate/stix/sdo/objects/IntrusionSetSdo.java
@@ -51,13 +51,11 @@ public interface IntrusionSetSdo extends DomainObject {
     Set<String> getAliases();
 
     @JsonProperty("first_seen") @JsonInclude(value = NON_EMPTY, content= NON_EMPTY)
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @Redactable
     Optional<Instant> getFirstSeen();
 
     @JsonProperty("last_seen") @JsonInclude(value = NON_EMPTY, content= NON_EMPTY)
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @Redactable
     Optional<Instant> getLastSeen();
diff --git a/src/main/java/io/digitalstate/stix/sdo/objects/ObservedDataSdo.java b/src/main/java/io/digitalstate/stix/sdo/objects/ObservedDataSdo.java
index bd0be43..c7d6dcc 100644
--- a/src/main/java/io/digitalstate/stix/sdo/objects/ObservedDataSdo.java
+++ b/src/main/java/io/digitalstate/stix/sdo/objects/ObservedDataSdo.java
@@ -32,14 +32,12 @@ public interface ObservedDataSdo extends DomainObject {
 
     @NotNull
     @JsonProperty("first_observed")
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @Redactable(useMask = true)
     Instant getFirstObserved();
 
     @NotNull
     @JsonProperty("last_observed")
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @Redactable(useMask = true)
     Instant getLastObserved();
diff --git a/src/main/java/io/digitalstate/stix/sdo/objects/ReportSdo.java b/src/main/java/io/digitalstate/stix/sdo/objects/ReportSdo.java
index f479a2e..a82b21b 100644
--- a/src/main/java/io/digitalstate/stix/sdo/objects/ReportSdo.java
+++ b/src/main/java/io/digitalstate/stix/sdo/objects/ReportSdo.java
@@ -55,7 +55,6 @@ public interface ReportSdo extends DomainObject {
 
     @NotNull
     @JsonProperty("published")
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @Redactable(useMask = true)
     Instant getPublished();
diff --git a/src/main/java/io/digitalstate/stix/sro/objects/SightingSro.java b/src/main/java/io/digitalstate/stix/sro/objects/SightingSro.java
index 9a5d9ba..21e4a23 100644
--- a/src/main/java/io/digitalstate/stix/sro/objects/SightingSro.java
+++ b/src/main/java/io/digitalstate/stix/sro/objects/SightingSro.java
@@ -35,13 +35,11 @@
 @Redactable
 public interface SightingSro extends RelationshipObject {
 
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @JsonProperty("first_seen") @JsonInclude(value = NON_EMPTY, content= NON_EMPTY)
     @Redactable
     Optional<Instant> getFirstSeen();
 
-    @JsonSerialize(using = InstantSerializer.class)
     @JsonFormat(pattern = StixDataFormats.TIMESTAMP_PATTERN, timezone = "UTC")
     @JsonProperty("last_seen") @JsonInclude(value = NON_EMPTY, content= NON_EMPTY)
     @Redactable
diff --git a/src/test/groovy/stix/end2end/IndicatorSdoSpec.groovy b/src/test/groovy/stix/end2end/IndicatorSdoSpec.groovy
new file mode 100644
index 0000000..4312686
--- /dev/null
+++ b/src/test/groovy/stix/end2end/IndicatorSdoSpec.groovy
@@ -0,0 +1,47 @@
+package stix.end2end
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import io.digitalstate.stix.bundle.Bundle
+import io.digitalstate.stix.json.StixParsers
+import io.digitalstate.stix.sdo.objects.AttackPattern
+import io.digitalstate.stix.sdo.objects.Indicator
+import io.digitalstate.stix.sdo.objects.IndicatorSdo
+import io.digitalstate.stix.sdo.objects.Report
+import spock.lang.Shared
+import spock.lang.Specification
+
+import java.time.Instant
+
+class IndicatorSdoSpec extends Specification {
+
+    @Shared ObjectMapper mapper = new ObjectMapper()
+
+    def "Create Indicator SDO and cycle from object to Json back to object"() {
+
+        when: "a objects are created,"
+        IndicatorSdo indicator1 = Indicator.builder()
+                .addLabels("malicious-activity")
+                .name("some name")
+                .validFrom(Instant.now())
+                .pattern("some pattern")
+                .build()
+
+        then: "Create a Report and Add Attack Patterns as Report Objects"
+
+        println indicator1.toJsonString()
+        String indicator1Json = indicator1.toJsonString()
+
+        println StixParsers.parseObject(indicator1Json).inspect()
+
+        and: "Create a bundle with the indicator"
+        Bundle bundle = Bundle.builder()
+                .addObjects(indicator1)
+                .build()
+
+        println bundle.toJsonString()
+
+        println StixParsers.parseBundle(bundle.toJsonString()).inspect()
+
+    }
+
+}
\ No newline at end of file