diff --git a/README.md b/README.md
index 339a360e..388ecd63 100644
--- a/README.md
+++ b/README.md
@@ -68,22 +68,6 @@ In progress:
 
 # Stack
 
-testing if mermaid is supported on crates.io
-```mermaid
-graph LR
-A[Square Rect] -- Link text --> B((Circle))
-A --> C(Round Rect)
-B --> D{Rhombus}
-C --> D
-```
-testing if plantuml is supported on crates.io
-```plantuml
-@startuml
-Alice -> Bob: Authentication Request
-Bob --> Alice: Authentication Response
-@enduml
-```
-
 - it's fully async built upon [tokio](https://crates.io/crates/tokio) and [fuse3](https://crates.io/crates/fuse3)
 - [ring](https://crates.io/crates/ring) for encryption and [argon2](https://crates.io/crates/argon2) for key derivation
   function (creating key used to encrypt the master encryption key from password)