diff --git a/CHANGELOG.md b/CHANGELOG.md
index 95c6c6b..2dedf20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,10 +8,12 @@ All notable changes to this project will be documented in this file.
 - [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 - [`auto-changelog`](https://github.com/CookPete/auto-changelog)
 
-## [v1.40.0-rc](https://github.com/zrwusa/data-structure-typed/compare/v1.35.0...main) (upcoming)
+## [v1.36.0](https://github.com/zrwusa/data-structure-typed/compare/v1.35.0...main) (upcoming)
 
 ### Changes
 
+- [BinaryTree, Heap] In abstract classes, only retain abstract methods.… [`#6`](https://github.com/zrwusa/data-structure-typed/pull/6)
+- [heap] test [`#5`](https://github.com/zrwusa/data-structure-typed/pull/5)
 - [heap, priority queue] Heap improved. References #123: redesigned [`#4`](https://github.com/zrwusa/data-structure-typed/pull/4)
 - test [`#3`](https://github.com/zrwusa/data-structure-typed/pull/3)
 
diff --git a/package-lock.json b/package-lock.json
index 2ef43c9..07ab2f7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,10 +15,10 @@
         "@typescript-eslint/eslint-plugin": "^6.7.4",
         "@typescript-eslint/parser": "^6.7.4",
         "auto-changelog": "^2.4.0",
-        "avl-tree-typed": "^1.35.1",
+        "avl-tree-typed": "^1.36.0",
         "benchmark": "^2.1.4",
-        "binary-tree-typed": "^1.35.1",
-        "bst-typed": "^1.35.1",
+        "binary-tree-typed": "^1.36.0",
+        "bst-typed": "^1.36.0",
         "dependency-cruiser": "^14.1.0",
         "eslint": "^8.50.0",
         "eslint-config-prettier": "^9.0.0",
@@ -2396,12 +2396,12 @@
       }
     },
     "node_modules/avl-tree-typed": {
-      "version": "1.35.1",
-      "resolved": "https://registry.npmjs.org/avl-tree-typed/-/avl-tree-typed-1.35.1.tgz",
-      "integrity": "sha512-RoJCVIZwebvY4naJHFoPgJBpFk+K0ATB4bWAd+uNYtMifGzHwKMJrJWSP8dpKazkVKT5q5/r+B/UHGE3fpIWUg==",
+      "version": "1.36.0",
+      "resolved": "https://registry.npmjs.org/avl-tree-typed/-/avl-tree-typed-1.36.0.tgz",
+      "integrity": "sha512-tM2hwYWvykohYKtWt9k6dEmRpVY++7mh6iT65whkjTmq0QSdZoE0ItFeXAAZklYrg5AU/OyYw3i7LVg8Qc59sQ==",
       "dev": true,
       "dependencies": {
-        "data-structure-typed": "^1.35.1"
+        "data-structure-typed": "^1.36.0"
       }
     },
     "node_modules/babel-jest": {
@@ -2586,12 +2586,12 @@
       }
     },
     "node_modules/binary-tree-typed": {
-      "version": "1.35.1",
-      "resolved": "https://registry.npmjs.org/binary-tree-typed/-/binary-tree-typed-1.35.1.tgz",
-      "integrity": "sha512-X92aIl9AJyqcNsZWbxAs7ZV/LTibfTuRCoKSjnMVXiKNP+5EGknU/CHOiQOIuprFehroZuEBeRjgT2BMWxu38A==",
+      "version": "1.36.0",
+      "resolved": "https://registry.npmjs.org/binary-tree-typed/-/binary-tree-typed-1.36.0.tgz",
+      "integrity": "sha512-cp79hqiIjyg6g7OniQAK6lwmP134i5pmW3GBdZkgfKy56FkKmrVNGWtgWpiIABHHrCanhibTm4lJunJEuCwaxA==",
       "dev": true,
       "dependencies": {
-        "data-structure-typed": "^1.35.1"
+        "data-structure-typed": "^1.36.0"
       }
     },
     "node_modules/brace-expansion": {
@@ -2670,12 +2670,12 @@
       }
     },
     "node_modules/bst-typed": {
-      "version": "1.35.1",
-      "resolved": "https://registry.npmjs.org/bst-typed/-/bst-typed-1.35.1.tgz",
-      "integrity": "sha512-1u9vtKvT+KlYNx+lkoBerl2wT3joKuI7dmINL7LEJoYIx2ew1m5NC5craCnd9RYNvqiwgrpV2Q0UuD3qEB8AkQ==",
+      "version": "1.36.0",
+      "resolved": "https://registry.npmjs.org/bst-typed/-/bst-typed-1.36.0.tgz",
+      "integrity": "sha512-tQ/YABarJL6CykZ3Yn2h45fIYi4SMAWrJjS9ilyZIEIgFoznG64CYYB6LNKinAGwgv1gTm4Rzh6ZwLGgexBIPw==",
       "dev": true,
       "dependencies": {
-        "data-structure-typed": "^1.35.1"
+        "data-structure-typed": "^1.36.0"
       }
     },
     "node_modules/buffer-from": {
@@ -3027,9 +3027,9 @@
       }
     },
     "node_modules/data-structure-typed": {
-      "version": "1.35.1",
-      "resolved": "https://registry.npmjs.org/data-structure-typed/-/data-structure-typed-1.35.1.tgz",
-      "integrity": "sha512-L9n2IZkMiI+UHfVnkGBie5c13gDtBXLZhiMhvMbV9TabwIRBrUKOwrMQ72A0bQFCGkEbDIR+WOL7XKwxrsracg==",
+      "version": "1.36.0",
+      "resolved": "https://registry.npmjs.org/data-structure-typed/-/data-structure-typed-1.36.0.tgz",
+      "integrity": "sha512-dOpH8lXAuz2eMNx2miSUywkOMsn8ydcKMNbu/svMpHUGGvpSWRwSeXsg+Rg5JYfT6+ddLR+HaTCbWlAuG+zMjw==",
       "dev": true
     },
     "node_modules/debug": {
diff --git a/package.json b/package.json
index db54a69..2088dec 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "data-structure-typed",
-  "version": "1.36.0",
+  "version": "1.36.2",
   "description": "Data Structures of Javascript & TypeScript. Binary Tree, BST, Graph, Heap, Priority Queue, Linked List, Queue, Deque, Stack, AVL Tree, Tree Multiset, Trie, Directed Graph, Undirected Graph, Singly Linked List, Doubly Linked List, Max Heap, Max Priority Queue, Min Heap, Min Priority Queue.",
   "main": "dist/index.js",
   "module": "lib/index.js",
@@ -54,10 +54,10 @@
     "@typescript-eslint/eslint-plugin": "^6.7.4",
     "@typescript-eslint/parser": "^6.7.4",
     "auto-changelog": "^2.4.0",
-    "avl-tree-typed": "^1.35.1",
+    "avl-tree-typed": "^1.36.0",
     "benchmark": "^2.1.4",
-    "binary-tree-typed": "^1.35.1",
-    "bst-typed": "^1.35.1",
+    "binary-tree-typed": "^1.36.0",
+    "bst-typed": "^1.36.0",
     "dependency-cruiser": "^14.1.0",
     "eslint": "^8.50.0",
     "eslint-config-prettier": "^9.0.0",