diff --git a/data/ecosystems/e/ethereum.toml b/data/ecosystems/e/ethereum.toml
index f3aa3037..af231ffb 100644
--- a/data/ecosystems/e/ethereum.toml
+++ b/data/ecosystems/e/ethereum.toml
@@ -1886,6 +1886,10 @@ url = "https://github.com/trailofbits/manticore"
 [[repo]]
 url = "https://github.com/trailofbits/not-so-smart-contracts"
 
+[[repo]]
+url = "https://github.com/tvanepps/State-of-the-Mixers-Summer-2019"
+tags = ["Documentation"]
+
 [[repo]]
 url = "https://github.com/ultra-koder/JobMarket"