diff --git a/implementations.json b/implementations.json
index 3d338b6..740c634 100644
--- a/implementations.json
+++ b/implementations.json
@@ -280,23 +280,6 @@
             "persistence": true
         }
     },
-    {
-        "repoURL": "https://github.com/adi/raft.ts",
-        "name": "raft.ts",
-        "authors": [
-            {
-                "name": "Adrian Punga",
-                "github": "adi"
-            }
-        ],
-        "language": "TypeScript",
-        "license": "Apache-2.0",
-        "features": {
-            "basic": false,
-            "membershipChanges": false,
-            "logCompaction": false
-        }
-    },
     {
         "repoURL": "https://github.com/adsharma/raft",
         "name": "python3-raft",
@@ -740,22 +723,6 @@
             "logCompaction": false
         }
     },
-    {
-        "repoURL": "https://github.com/chicm/CmRaft",
-        "name": "chicm/CmRaft",
-        "authors": [
-            {
-                "name": "Cheng Min Chi"
-            }
-        ],
-        "language": "Java",
-        "license": "Apache-2.0",
-        "features": {
-            "basic": true,
-            "membershipChanges": false,
-            "logCompaction": false
-        }
-    },
     {
         "repoURL": "https://github.com/cloud-software-foundation/c5-replicator",
         "name": "C5 replicator",
@@ -1978,24 +1945,6 @@
             "persistence": true
         }
     },
-    {
-        "repoURL": "https://github.com/pi-plan/praft",
-        "name": "PRaft",
-        "authors": [
-            {
-                "name": "Buqing Ma",
-                "github": "laomafeima"
-            }
-        ],
-        "language": "Python",
-        "license": "BSD",
-        "features": {
-            "basic": true,
-            "membershipChanges": true,
-            "logCompaction": true,
-            "persistence": true
-        }
-    },
     {
         "repoURL": "https://github.com/pingcap/tikv",
         "name": "TiKV",
@@ -2155,22 +2104,6 @@
             "persistence": true
         }
     },
-    {
-        "repoURL": "https://github.com/rodriguezvalencia/rafting",
-        "name": "rodriguezvalencia/rafting",
-        "authors": [
-            {
-                "name": "Sergio Rodriguez"
-            }
-        ],
-        "language": "Clojure",
-        "license": "MIT",
-        "features": {
-            "basic": false,
-            "membershipChanges": false,
-            "logCompaction": false
-        }
-    },
     {
         "repoURL": "https://github.com/royaltm/node-zmq-raft",
         "name": "\u00d8MQ Raft for node.js",