diff --git a/quartz-manager-parent/quartz-manager-starter-api/src/main/java/it/fabioformosa/quartzmanager/controllers/TriggerController.java b/quartz-manager-parent/quartz-manager-starter-api/src/main/java/it/fabioformosa/quartzmanager/controllers/TriggerController.java
index d2ea4f1..03583ce 100644
--- a/quartz-manager-parent/quartz-manager-starter-api/src/main/java/it/fabioformosa/quartzmanager/controllers/TriggerController.java
+++ b/quartz-manager-parent/quartz-manager-starter-api/src/main/java/it/fabioformosa/quartzmanager/controllers/TriggerController.java
@@ -44,7 +44,7 @@ public class TriggerController {
   }
 
   @PutMapping("/{name}")
-  public TriggerDTO rescheduleTrigger(@PathVariable String name, @RequestBody SchedulerConfigParam config) throws SchedulerException {
+  public TriggerDTO rescheduleTrigger(@PathVariable String name, @Valid @RequestBody SchedulerConfigParam config) throws SchedulerException {
     log.info("TRIGGER - RESCHEDULING the trigger {} {}", name, config);
     TriggerDTO triggerDTO = schedulerService.rescheduleTrigger(name, config);
     log.info("TRIGGER - RESCHEDULED the trigger {}", triggerDTO);
diff --git a/quartz-manager-parent/quartz-manager-starter-api/src/test/java/it/fabioformosa/quartzmanager/controllers/TriggerControllerTest.java b/quartz-manager-parent/quartz-manager-starter-api/src/test/java/it/fabioformosa/quartzmanager/controllers/TriggerControllerTest.java
index c0e33ec..85ec109 100644
--- a/quartz-manager-parent/quartz-manager-starter-api/src/test/java/it/fabioformosa/quartzmanager/controllers/TriggerControllerTest.java
+++ b/quartz-manager-parent/quartz-manager-starter-api/src/test/java/it/fabioformosa/quartzmanager/controllers/TriggerControllerTest.java
@@ -57,7 +57,7 @@ class TriggerControllerTest {
 
   @ParameterizedTest
   @ArgumentsSource(InvalidSchedulerConfigParamProvider.class)
-  void givenAnInvalidSchedulerConfigParam_whenPosted_thenAnErrorIsReturned(SchedulerConfigParam invalidSchedulerConfigParam) throws Exception {
+  void givenAnInvalidSchedulerConfigParam_whenRequestedANewTrigger_thenAnErrorIsReturned(SchedulerConfigParam invalidSchedulerConfigParam) throws Exception {
     mockMvc.perform(post(TriggerController.TRIGGER_CONTROLLER_BASE_URL + "/mytrigger")
       .contentType(MediaType.APPLICATION_JSON)
       .content(TestUtils.toJson(invalidSchedulerConfigParam)))
@@ -87,6 +87,15 @@ class TriggerControllerTest {
       .andExpect(MockMvcResultMatchers.content().json(TestUtils.toJson(expectedTriggerDTO)));
   }
 
+  @ParameterizedTest
+  @ArgumentsSource(InvalidSchedulerConfigParamProvider.class)
+  void givenAnInvalidSchedulerConfigParam_whenATriggerIsRescheduled_thenAnErrorIsReturned(SchedulerConfigParam invalidSchedulerConfigParam) throws Exception {
+    mockMvc.perform(put(TriggerController.TRIGGER_CONTROLLER_BASE_URL + "/mytrigger")
+        .contentType(MediaType.APPLICATION_JSON)
+        .content(TestUtils.toJson(invalidSchedulerConfigParam)))
+      .andExpect(MockMvcResultMatchers.status().is4xxClientError());
+  }
+
   private SchedulerConfigParam buildSimpleSchedulerConfigParam() {
     return SchedulerConfigParam.builder().maxCount(20).triggerPerDay(20000L).build();
   }