diff --git a/data/ecosystems/o/optimism.toml b/data/ecosystems/o/optimism.toml
index be37a1aa..f1db6e22 100644
--- a/data/ecosystems/o/optimism.toml
+++ b/data/ecosystems/o/optimism.toml
@@ -138,6 +138,9 @@ url = "https://github.com/ethereum-optimism/openethereum"
 [[repo]]
 url = "https://github.com/ethereum-optimism/openzeppelin-contracts"
 
+[[repo]]
+url = "https://github.com/ethereum-optimism/OPerating-manual"
+
 [[repo]]
 url = "https://github.com/ethereum-optimism/optimism"