diff --git a/mdx-web/src/main/java/com/mx/path/model/mdx/web/MdxOnDemandSerializationWebMvcConfigurer.java b/mdx-web/src/main/java/com/mx/path/model/mdx/web/MdxOnDemandSerializationWebMvcConfigurer.java
index 75ca5475..87b53636 100644
--- a/mdx-web/src/main/java/com/mx/path/model/mdx/web/MdxOnDemandSerializationWebMvcConfigurer.java
+++ b/mdx-web/src/main/java/com/mx/path/model/mdx/web/MdxOnDemandSerializationWebMvcConfigurer.java
@@ -11,6 +11,7 @@
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.http.converter.StringHttpMessageConverter;
 import org.springframework.http.converter.json.GsonHttpMessageConverter;
+import org.springframework.http.converter.json.JacksonJsonHttpMessageConverter;
 import org.springframework.http.converter.xml.JacksonXmlHttpMessageConverter;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
@@ -22,7 +23,10 @@
 public class MdxOnDemandSerializationWebMvcConfigurer implements WebMvcConfigurer {
 
   /**
-   * List of all configured converts. All others will be removed before inserting custom MappingJackson2XmlHttpMessageConverter
+   * Converters retained by {@link #extendMessageConverters(List)}; every other converter is removed before the
+   * custom XML converter is appended. Gson handles MDX JSON serialization. The Jackson JSON converter is retained
+   * because Spring Boot's actuator endpoints (e.g. {@code /actuator/health}) are serialized with Jackson; without it
+   * those responses have no writable converter and fail with {@code HttpMessageNotWritableException}.
    */
   static final List<Class<?>> CONVERT_CLASSES;
   static {
@@ -30,6 +34,7 @@ public class MdxOnDemandSerializationWebMvcConfigurer implements WebMvcConfigure
     CONVERT_CLASSES.add(GsonHttpMessageConverter.class);
     CONVERT_CLASSES.add(StringHttpMessageConverter.class);
     CONVERT_CLASSES.add(ByteArrayHttpMessageConverter.class);
+    CONVERT_CLASSES.add(JacksonJsonHttpMessageConverter.class);
   }
 
   @Override
diff --git a/mdx-web/src/test/groovy/com/mx/path/model/mdx/web/MdxOnDemandSerializationWebMvcConfigurerTest.groovy b/mdx-web/src/test/groovy/com/mx/path/model/mdx/web/MdxOnDemandSerializationWebMvcConfigurerTest.groovy
index 25c18327..944467f9 100644
--- a/mdx-web/src/test/groovy/com/mx/path/model/mdx/web/MdxOnDemandSerializationWebMvcConfigurerTest.groovy
+++ b/mdx-web/src/test/groovy/com/mx/path/model/mdx/web/MdxOnDemandSerializationWebMvcConfigurerTest.groovy
@@ -5,6 +5,7 @@ import org.springframework.http.converter.FormHttpMessageConverter
 import org.springframework.http.converter.ResourceHttpMessageConverter
 import org.springframework.http.converter.StringHttpMessageConverter
 import org.springframework.http.converter.json.GsonHttpMessageConverter
+import org.springframework.http.converter.json.JacksonJsonHttpMessageConverter
 import org.springframework.http.converter.xml.JacksonXmlHttpMessageConverter
 
 import spock.lang.Specification
@@ -22,6 +23,7 @@ class MdxOnDemandSerializationWebMvcConfigurerTest extends Specification {
   def "filters non-whitelisted message converters and appends the custom XML converter"() {
     given:
     def gsonConverter = new GsonHttpMessageConverter()
+    def jacksonJsonConverter = new JacksonJsonHttpMessageConverter()
     def stringConverter = new StringHttpMessageConverter()
     def byteArrayConverter = new ByteArrayHttpMessageConverter()
     def unwantedResourceConverter = new ResourceHttpMessageConverter()
@@ -30,6 +32,7 @@ class MdxOnDemandSerializationWebMvcConfigurerTest extends Specification {
     def converters = [
       unwantedResourceConverter,
       gsonConverter,
+      jacksonJsonConverter,
       unwantedFormConverter,
       stringConverter,
       byteArrayConverter
@@ -40,8 +43,9 @@ class MdxOnDemandSerializationWebMvcConfigurerTest extends Specification {
 
     then:
     verifyAll(converters) {
-      it.size() == 4
+      it.size() == 5
       it.contains(gsonConverter)
+      it.contains(jacksonJsonConverter)
       it.contains(stringConverter)
       it.contains(byteArrayConverter)
       !it.contains(unwantedResourceConverter)