diff --git a/CHANGELOG.md b/CHANGELOG.md
index 795a2b8..b048a9a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 # Changelog
 ## main
 
+## v0.13.6
+- Fixed typo on relation create
+
 ## v0.13.5
 - Fixed estate find method
 
diff --git a/src/Query/RelationBuilder.php b/src/Query/RelationBuilder.php
index ede21c4..ec589a7 100644
--- a/src/Query/RelationBuilder.php
+++ b/src/Query/RelationBuilder.php
@@ -88,8 +88,8 @@ public function create(): array
             OnOfficeResourceType::Relation,
             parameters: [
                 OnOfficeService::RELATIONTYPE => $this->relationType,
-                OnOfficeService::PARENTIDS => $this->parentIds,
-                OnOfficeService::CHILDIDS => $this->childIds,
+                OnOfficeService::PARENTID => $this->parentIds,
+                OnOfficeService::CHILDID => $this->childIds,
                 ...$this->customParameters,
             ],
         );
diff --git a/src/Services/OnOfficeParameterConst.php b/src/Services/OnOfficeParameterConst.php
index 01d6bd9..be60b01 100644
--- a/src/Services/OnOfficeParameterConst.php
+++ b/src/Services/OnOfficeParameterConst.php
@@ -25,8 +25,12 @@ trait OnOfficeParameterConst
 
     public const PARENTIDS = 'parentids';
 
+    public const PARENTID = 'parentid';
+
     public const CHILDIDS = 'childids';
 
+    public const CHILDID = 'childid';
+
     public const RECORDIDS = 'recordids';
 
     public const PARAMETERCACHEID = 'parameterCacheId';