diff --git a/README.md b/README.md
index 0f805e4..707b8bc 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,7 @@
       * SQL
         * Postgres
         * MySQL
+        * Cassandra
       * NoSQL
         * KeyValue
           * [BoJack](https://github.com/marceloboeira/bojack) ✍🏼 💻 🆓
diff --git a/resources/topic-graph.mmd b/resources/topic-graph.mmd
index 2cd1b05..1a9d1fd 100644
--- a/resources/topic-graph.mmd
+++ b/resources/topic-graph.mmd
@@ -28,8 +28,9 @@ graph TD
 
   SW --> DB[Databases]
     DB --> SQL[SQL]
-      SQL --> PgSQL[PostgreSQL]
-      SQL --> MySQL[MySQL]
+      SQL --> PgSQL
+      SQL --> MySQL
+      SQL --> Cassandra
     DB --> NoSQL[NoSQL]
       NoSQL --> KV[KeyValue]
         KV --> Rd[Redis]
diff --git a/resources/topic-graph.png b/resources/topic-graph.png
index 77f2c2b..f37baf4 100644
Binary files a/resources/topic-graph.png and b/resources/topic-graph.png differ