diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e4f379..91cac89 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,11 @@ on [Keep a CHANGELOG](http://keepachangelog.com/). This project adheres to
 
 ## [Unreleased]
 
+## [4.0.0-M19] - 2019-05-10
+### Changed
+- Refactor: Moved TransformerApi from json-transformer project in here
+
+
 ## [4.0.0-M18] - 2019-05-03
 ### Changed
 - Update test-utils version to 1.23.0
diff --git a/framework-api-unifiedsearch/src/main/java/uk/gov/justice/services/unifiedsearch/TransformerApi.java b/framework-api-unifiedsearch/src/main/java/uk/gov/justice/services/unifiedsearch/TransformerApi.java
new file mode 100644
index 0000000..96443b9
--- /dev/null
+++ b/framework-api-unifiedsearch/src/main/java/uk/gov/justice/services/unifiedsearch/TransformerApi.java
@@ -0,0 +1,8 @@
+package uk.gov.justice.services.unifiedsearch;
+
+import javax.json.JsonObject;
+
+public interface TransformerApi {
+
+    JsonObject transformWithJolt(final String joltOperations, final JsonObject inputJson);
+}