diff --git a/CHANGELOG.md b/CHANGELOG.md
index feb41091..c22d0c05 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,21 @@
 
 All notable changes to this project are documented in this file.
 
+## 1.8.4
+
+**Release date:** 2026-04-21
+
+This patch release introduces the `MigrateAPIVersion` feature gate for
+migrating the API version of resources in managed field entries, which
+fixes errors like `dry-run failed: .spec.accessPolicy: field not declared
+in schema`.
+
+Improvements:
+- Introduce support for migrating API version
+  [#1639](https://github.com/fluxcd/kustomize-controller/pull/1639)
+- Update fluxcd/pkg dependencies
+  [#1637](https://github.com/fluxcd/kustomize-controller/pull/1637)
+
 ## 1.8.3
 
 **Release date:** 2026-04-07
diff --git a/config/manager/kustomization.yaml b/config/manager/kustomization.yaml
index 13034ca3..a133d5fe 100644
--- a/config/manager/kustomization.yaml
+++ b/config/manager/kustomization.yaml
@@ -5,4 +5,4 @@ resources:
 images:
   - name: fluxcd/kustomize-controller
     newName: fluxcd/kustomize-controller
-    newTag: v1.8.3
+    newTag: v1.8.4
diff --git a/go.mod b/go.mod
index 9631f174..bc42305f 100644
--- a/go.mod
+++ b/go.mod
@@ -19,7 +19,7 @@ require (
 	github.com/cyphar/filepath-securejoin v0.6.1
 	github.com/dimchansky/utfbom v1.1.1
 	github.com/fluxcd/cli-utils v0.37.2-flux.1
-	github.com/fluxcd/kustomize-controller/api v1.8.3
+	github.com/fluxcd/kustomize-controller/api v1.8.4
 	github.com/fluxcd/pkg/apis/acl v0.9.0
 	github.com/fluxcd/pkg/apis/event v0.24.1
 	github.com/fluxcd/pkg/apis/kustomize v1.15.1