diff --git a/src/main/resources/changelog.txt b/src/main/resources/changelog.txt
index 20aba1ba..e597dda7 100644
--- a/src/main/resources/changelog.txt
+++ b/src/main/resources/changelog.txt
@@ -1,6 +1,19 @@
 Spring HATEOAS Changelog
 ========================
 
+Changes in version 1.3 M1 (2021-01-13)
+----------------------------------------
+- #1433 - Upgrade to Spring Framework 5.3.3.
+- #1425 - RepresentationModelProcessor not invoked for PagedModel / CollectionModel consisting of RepresentationModels.
+- #1424 - More convenience methods for MvcLink.
+- #1423 - HaloFormsConfiguration.withPattern(…) should not be deprecated.
+- #1417 - Release directly to OSS Sonatype.
+- #1412 - Extracted mappings still contain regex matching expressions.
+- #1399 - Curie information not rendered if model contains pre-curied links.
+- #1388 - Properly parse new version format for CI.
+- #1379 - RepresentationModelProcessor invoked for invalid CollectionModel payload if specialized.
+- #475  - Allow all UriTemplate variable names following RFC.
+
 Changes in version 1.2 GA (2020-10-27)
 ----------------------------------------
 - #1384 - Upgrade to Spring Framework 5.3.
diff --git a/src/test/java/org/springframework/hateoas/support/ChangelogCreator.java b/src/test/java/org/springframework/hateoas/support/ChangelogCreator.java
index 23a661cc..63c294a6 100644
--- a/src/test/java/org/springframework/hateoas/support/ChangelogCreator.java
+++ b/src/test/java/org/springframework/hateoas/support/ChangelogCreator.java
@@ -38,7 +38,7 @@ import com.jayway.jsonpath.JsonPath;
  */
 class ChangelogCreator {
 
-	private static final int MILESTONE_ID = 48;
+	private static final int MILESTONE_ID = 54;
 	private static final String URI_TEMPLATE = "https://api.github.com/repos/spring-projects/spring-hateoas/issues?milestone={id}&state=closed";
 
 	public static void main(String... args) {
@@ -52,8 +52,7 @@ class ChangelogCreator {
 
 		HttpEntity<String> response = webClient //
 				.get().uri(URI_TEMPLATE, MILESTONE_ID) //
-				.exchange() //
-				.flatMap(clientResponse -> clientResponse.toEntity(String.class)) //
+				.exchangeToMono(clientResponse -> clientResponse.toEntity(String.class)) //
 				.block(Duration.ofSeconds(10));
 
 		boolean keepChecking = true;
@@ -71,8 +70,7 @@ class ChangelogCreator {
 
 				response = webClient //
 						.get().uri(links.getRequiredLink(IanaLinkRelations.NEXT).expand().getHref()) //
-						.exchange() //
-						.flatMap(clientResponse -> clientResponse.toEntity(String.class)) //
+						.exchangeToMono(clientResponse -> clientResponse.toEntity(String.class)) //
 						.block(Duration.ofSeconds(10));
 
 			} else {
@@ -91,7 +89,7 @@ class ChangelogCreator {
 
 		if (header) {
 			System.out.println(
-					"Changes in version " + JsonPath.read(content, "$[1].milestone.title") + " (" + LocalDate.now() + ")");
+					"Changes in version " + JsonPath.read(content, "$[0].milestone.title") + " (" + LocalDate.now() + ")");
 			System.out.println("----------------------------------------");
 		}