diff --git a/README.md b/README.md
index 71299dc..5412df6 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,12 @@
 # Thunder Network APIs
 This package is for using Thunder Network's APIs like Internet Avatar or Credits system.
 
-WARNING: This may package is not stable, it can change at any time, like the API.
+> ⚠️ This may package is not stable, it can change at any time.
+
+# Development
+## Recommended Technologies
+- Yarn
+- `https://repository.thundernetwork.org/repository/npm-central/` come repository npm
+> yarn config set registry https://repository.thundernetwork.org/repository/npm-central/
+> OR
+> npm config set registry https://repository.thundernetwork.org/repository/npm-central/
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