diff --git a/data/ecosystems/c/cardano.toml b/data/ecosystems/c/cardano.toml
index 374d6742..e436d084 100644
--- a/data/ecosystems/c/cardano.toml
+++ b/data/ecosystems/c/cardano.toml
@@ -111,6 +111,9 @@ url = "https://github.com/input-output-hk/cardano-explorer-app"
 [[repo]]
 url = "https://github.com/input-output-hk/cardano-graphql"
 
+[[repo]]
+url = "https://github.com/input-output-hk/cardano-haskell"
+
 [[repo]]
 url = "https://github.com/input-output-hk/cardano-http-bridge"