diff --git a/README.md b/README.md
index 49e37b6..7ea1f9b 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,9 @@
+# DEPRECATED
+
+The library is deprecated and is not supported/maintained anymore
+
+Use [Cadence Testing Framework](https://cadence-lang.org/docs/testing-framework) instead
+
 <div style="text-align: center; margin: 1em 0 2em">
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