diff --git a/data/ecosystems/o/open-source-cryptography.toml b/data/ecosystems/o/open-source-cryptography.toml
index a9ac5107..576a8de6 100644
--- a/data/ecosystems/o/open-source-cryptography.toml
+++ b/data/ecosystems/o/open-source-cryptography.toml
@@ -13,3 +13,6 @@ tags = ["Wallet"]
 [[repo]]
 url = "https://github.com/ektrah/nsec"
 tags = ["Library"]
+
+[[repo]]
+url = "https://github.com/mit-dci/zksigma"