diff --git a/data/users/Saran-pariyar.json b/data/users/Saran-pariyar.json
index 4e7b84f..ed7ea38 100644
--- a/data/users/Saran-pariyar.json
+++ b/data/users/Saran-pariyar.json
@@ -4,7 +4,7 @@
   "image": "https://avatars.githubusercontent.com/u/86418083",
   "categories": [
     {
-      "slug": "web-development",
+      "slug": "ç",
       "topics": ["react","CSS", "javascript"]
     }
   ],
diff --git a/data/users/codewithyaku.json b/data/users/codewithyaku.json
new file mode 100644
index 0000000..f2ed411
--- /dev/null
+++ b/data/users/codewithyaku.json
@@ -0,0 +1,27 @@
+{
+    "name": "Yaku",
+    "bio": "Full-Stack developer",
+    "image": "https://avatars.githubusercontent.com/u/72974932?v=4",
+    "categories": [
+        {
+            "slug": "programming",
+            "topics": ["javascript","blockhain"]
+        },
+        {
+            "slug": "mobile-development",
+            "topics": ["android","java","kotlin"]
+        },
+        {
+            "slug": "web-development",
+            "topics": ["javascript","CSS"]
+        },
+        {
+            "slug": "software-development",
+            "topics": ["Python","Go"]
+        }
+      
+    ],
+    "contacts": {
+        "twitter": "codewithYaku"
+    }
+}
diff --git a/public/categories.json b/public/categories.json
index 1b362c8..d783755 100644
--- a/public/categories.json
+++ b/public/categories.json
@@ -18,5 +18,9 @@
   {
     "name": "Data Science",
     "slug": "data-science"
+  },
+  {
+    "name": "Blockchain Development",
+    "slug": "blockchain"
   }
 ]