diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4a140fe..20f7eb1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,9 @@ Given a version number MAJOR.MINOR.PATCH, increment:
 
 ## [Unreleased]
 
+### Fix
+- Invoice.payment request
+
 ## [2.14.0] - 2023-05-03
 ### Added
 - rules attribute to Invoice resource
diff --git a/src/main/java/com/starkbank/utils/Rest.java b/src/main/java/com/starkbank/utils/Rest.java
index 1e1be52..3ee0cb5 100644
--- a/src/main/java/com/starkbank/utils/Rest.java
+++ b/src/main/java/com/starkbank/utils/Rest.java
@@ -133,7 +133,7 @@ public static InputStream getContent(Resource.ClassData resource, String id, Str
     }
 
     public static <T extends SubResource> T getSubResource(Resource.ClassData resource, String id, SubResource.ClassData subResource, User user, Map<String, Object> options) throws Exception {
-        String content = Response.fetch(Api.endpoint(resource, id) + "/" + Api.endpoint(subResource), "GET", null, options, user).content();
+        String content = Response.fetch(Api.endpoint(resource, id) + Api.endpoint(subResource), "GET", null, options, user).content();
         JsonObject contentJson = new Gson().fromJson(content, JsonObject.class);
         JsonObject jsonObject = contentJson.get(Api.getLastName(subResource)).getAsJsonObject();
         Gson gson = GsonEvent.getInstance();
@@ -141,7 +141,7 @@ public static <T extends SubResource> T getSubResource(Resource.ClassData resour
     }
 
     public static <T extends SubResource> List<T> getSubResources(Resource.ClassData resource, String id, SubResource.ClassData subResource, User user, Map<String, Object> options) throws Exception {
-        String content = Response.fetch(Api.endpoint(resource, id) + "/" + Api.endpoint(subResource), "GET", null, options, user).content();
+        String content = Response.fetch(Api.endpoint(resource, id) + Api.endpoint(subResource), "GET", null, options, user).content();
         JsonObject contentJson = new Gson().fromJson(content, JsonObject.class);
         JsonArray jsonArray = contentJson.get(Api.getLastNamePlural(subResource)).getAsJsonArray();
         List<T> entities = new ArrayList<>();