diff --git a/test-utils/src/main/kotlin/com/r3corda/testing/http/HttpUtils.kt b/test-utils/src/main/kotlin/com/r3corda/testing/http/HttpUtils.kt
index 4ba29c883c..11c66046af 100644
--- a/test-utils/src/main/kotlin/com/r3corda/testing/http/HttpUtils.kt
+++ b/test-utils/src/main/kotlin/com/r3corda/testing/http/HttpUtils.kt
@@ -18,7 +18,7 @@ object HttpUtils {
 
     fun putJson(url: URL, data: String) : Boolean {
         val body = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), data)
-        return makeRequest(Request.Builder().url(url).header("Content-Type", "application/json").post(body).build())
+        return makeRequest(Request.Builder().url(url).header("Content-Type", "application/json").put(body).build())
     }
 
     fun postJson(url: URL, data: String) : Boolean {