diff --git a/.github/workflows/gradle-check.yml b/.github/workflows/gradle-check.yml
index 8a072ec..d0e79f0 100644
--- a/.github/workflows/gradle-check.yml
+++ b/.github/workflows/gradle-check.yml
@@ -5,8 +5,6 @@ on:
     branches:
       - master
   pull_request:
-  schedule:
-    - cron: '0 0 * * 1,4'
 
 jobs:
   check:
diff --git a/build.gradle b/build.gradle
index e008c17..375232a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -24,7 +24,7 @@ buildscript {
     VERSION = getAppVersion()
     VCS_URL = 'https://github.com/comodal/pagerduty-client'
     // Used by systems.comodal.pagerduty_event_json_iterator_adapter
-    jsoniter = "2.9.+" // https://github.com/comodal/json-iterator/releases
+    jsoniter = "2.10.+" // https://github.com/comodal/json-iterator/releases
   }
 }
 
diff --git a/systems.comodal.pagerduty_event_client/src/main/java/systems/comodal/pagerduty/event/service/PagerDutyService.java b/systems.comodal.pagerduty_event_client/src/main/java/systems/comodal/pagerduty/event/service/PagerDutyService.java
index e5fc641..e9deb45 100644
--- a/systems.comodal.pagerduty_event_client/src/main/java/systems/comodal/pagerduty/event/service/PagerDutyService.java
+++ b/systems.comodal.pagerduty_event_client/src/main/java/systems/comodal/pagerduty/event/service/PagerDutyService.java
@@ -1,6 +1,7 @@
 package systems.comodal.pagerduty.event.service;
 
 import systems.comodal.pagerduty.event.client.PagerDutyEventClient;
+import systems.comodal.pagerduty.event.data.PagerDutyChangeEventPayload;
 import systems.comodal.pagerduty.event.data.PagerDutyEventPayload;
 import systems.comodal.pagerduty.event.data.PagerDutyEventResponse;
 
@@ -102,6 +103,32 @@ CompletableFuture<PagerDutyEventResponse> triggerEvent(final PagerDutyEventPaylo
                                                          final LongUnaryOperator retryDelayFn,
                                                          final TimeUnit timeUnit);
 
+  CompletableFuture<PagerDutyEventResponse> changeEvent(final PagerDutyChangeEventPayload payload,
+                                                        final long stepDelay,
+                                                        final long maxDelay,
+                                                        final TimeUnit timeUnit);
+
+  CompletableFuture<PagerDutyEventResponse> changeEvent(final PagerDutyChangeEventPayload payload,
+                                                        final Duration giveUpAfter,
+                                                        final long stepDelay,
+                                                        final long maxDelay,
+                                                        final TimeUnit timeUnit);
+
+  CompletableFuture<PagerDutyEventResponse> changeEvent(final PagerDutyChangeEventPayload payload,
+                                                        final int maxRetries,
+                                                        final long stepDelay,
+                                                        final long maxDelay,
+                                                        final TimeUnit timeUnit);
+
+  CompletableFuture<PagerDutyEventResponse> changeEvent(final PagerDutyChangeEventPayload payload,
+                                                        final LongUnaryOperator retryDelayFn,
+                                                        final TimeUnit timeUnit);
+
+  CompletableFuture<PagerDutyEventResponse> changeEvent(final PagerDutyChangeEventPayload payload,
+                                                        final int retry,
+                                                        final LongUnaryOperator retryDelayFn,
+                                                        final TimeUnit timeUnit);
+
   interface Builder {
 
     PagerDutyService create();
diff --git a/systems.comodal.pagerduty_event_client/src/main/java/systems/comodal/pagerduty/event/service/PagerDutyServiceVal.java b/systems.comodal.pagerduty_event_client/src/main/java/systems/comodal/pagerduty/event/service/PagerDutyServiceVal.java
index 48a5811..6ff2bd9 100644
--- a/systems.comodal.pagerduty_event_client/src/main/java/systems/comodal/pagerduty/event/service/PagerDutyServiceVal.java
+++ b/systems.comodal.pagerduty_event_client/src/main/java/systems/comodal/pagerduty/event/service/PagerDutyServiceVal.java
@@ -1,6 +1,7 @@
 package systems.comodal.pagerduty.event.service;
 
 import systems.comodal.pagerduty.event.client.PagerDutyEventClient;
+import systems.comodal.pagerduty.event.data.PagerDutyChangeEventPayload;
 import systems.comodal.pagerduty.event.data.PagerDutyEventPayload;
 import systems.comodal.pagerduty.event.data.PagerDutyEventResponse;
 import systems.comodal.pagerduty.exceptions.PagerDutyClientException;
@@ -124,8 +125,21 @@ private static boolean canBeRetried(final Throwable throwable) {
     };
   }
 
+  private static RuntimeException throwRuntimeException(final Throwable throwable) {
+    if (throwable instanceof final RuntimeException runtimeException) {
+      throw runtimeException;
+    } else if (throwable.getCause() instanceof final RuntimeException runtimeException) {
+      throw runtimeException;
+    } else {
+      throw new RuntimeException(throwable.getCause() == null ? throwable : throwable.getCause());
+    }
+  }
+
   @Override
-  public CompletableFuture<PagerDutyEventResponse> triggerEvent(final PagerDutyEventPayload payload, final long stepDelay, final long maxDelay, final TimeUnit timeUnit) {
+  public CompletableFuture<PagerDutyEventResponse> triggerEvent(final PagerDutyEventPayload payload,
+                                                                final long stepDelay,
+                                                                final long maxDelay,
+                                                                final TimeUnit timeUnit) {
     return triggerEvent(payload, 0, PagerDutyService.createRetryDelayFn(stepDelay, maxDelay), timeUnit);
   }
 
@@ -184,6 +198,66 @@ private CompletableFuture<PagerDutyEventResponse> triggerEvent(final PagerDutyEv
     }
   }
 
+  @Override
+  public CompletableFuture<PagerDutyEventResponse> changeEvent(final PagerDutyChangeEventPayload payload,
+                                                               final long stepDelay,
+                                                               final long maxDelay,
+                                                               final TimeUnit timeUnit) {
+    return changeEvent(payload, 0, PagerDutyService.createRetryDelayFn(stepDelay, maxDelay), timeUnit);
+  }
+
+  @Override
+  public CompletableFuture<PagerDutyEventResponse> changeEvent(final PagerDutyChangeEventPayload payload,
+                                                               final Duration giveUpAfter,
+                                                               final long stepDelay,
+                                                               final long maxDelay,
+                                                               final TimeUnit timeUnit) {
+    final int maxRetries = (int) Math.min(Integer.MAX_VALUE, giveUpAfter.toMillis() / timeUnit.toMillis(stepDelay));
+    return changeEvent(payload, 0, PagerDutyService.createRetryDelayFn(maxRetries, stepDelay, maxDelay), timeUnit);
+  }
+
+  @Override
+  public CompletableFuture<PagerDutyEventResponse> changeEvent(final PagerDutyChangeEventPayload payload,
+                                                               final int maxRetries,
+                                                               final long stepDelay,
+                                                               final long maxDelay,
+                                                               final TimeUnit timeUnit) {
+    return changeEvent(payload, 0, PagerDutyService.createRetryDelayFn(maxRetries, stepDelay, maxDelay), timeUnit);
+  }
+
+  @Override
+  public CompletableFuture<PagerDutyEventResponse> changeEvent(final PagerDutyChangeEventPayload payload,
+                                                               final LongUnaryOperator retryDelayFn,
+                                                               final TimeUnit timeUnit) {
+    return changeEvent(payload, 0, retryDelayFn, timeUnit);
+  }
+
+  @Override
+  public CompletableFuture<PagerDutyEventResponse> changeEvent(final PagerDutyChangeEventPayload payload,
+                                                               final int retry,
+                                                               final LongUnaryOperator retryDelayFn,
+                                                               final TimeUnit timeUnit) {
+    final long retryDelay = retryDelayFn.applyAsLong(retry);
+    if (retryDelay < 0) {
+      return null;
+    }
+    final var responseFuture = client.defaultRouteChangeEvent(payload);
+    final Function<Throwable, CompletableFuture<PagerDutyEventResponse>> exceptionally = throwable -> {
+      final int numFailures = retry + 1;
+      logFailure(throwable, numFailures, retryDelay, timeUnit, String.format("to send change event:%n  %s", payload));
+      if (canBeRetried(throwable)) {
+        return changeEvent(payload, numFailures, retryDelayFn, timeUnit);
+      } else {
+        throw throwRuntimeException(throwable);
+      }
+    };
+    if (retryDelay > 0) {
+      return responseFuture.exceptionallyComposeAsync(exceptionally, delayedExecutor(retryDelay, timeUnit));
+    } else {
+      return responseFuture.exceptionallyCompose(exceptionally);
+    }
+  }
+
   @Override
   public String toString() {
     return "PagerdutyServiceVal{client=" + client + ", eventPrototype=" + eventPrototype + '}';