diff --git a/databases.md b/databases.md
index ea5de14..6bb1843 100644
--- a/databases.md
+++ b/databases.md
@@ -63,7 +63,7 @@ in a Relational Database Management System](https://www2.cs.duke.edu/courses/com
 ### CockroachDB
 
 - [x] 🔗 [**Architecture Overview**](https://www.cockroachlabs.com/docs/stable/architecture/overview.html)
-- [ ] 📄 [**CockroachDB: The Resilient Geo-Distributed SQL Database**](https://dl.acm.org/doi/pdf/10.1145/3318464.3386134) (R Taft et al 2020)
+- [x] 📄 [**CockroachDB: The Resilient Geo-Distributed SQL Database**](https://dl.acm.org/doi/pdf/10.1145/3318464.3386134) (R Taft et al 2020)
 - [x] 💬 [**Serializable, Lockless, Distributed: Isolation in CockroachDB**](https://www.cockroachlabs.com/blog/serializable-lockless-distributed-isolation-cockroachdb/) (M Tracy 2016)
 - [x] 💬 [How We Built a Cost-Based SQL Optimizer](https://www.cockroachlabs.com/blog/building-cost-based-sql-optimizer/) (A Kimball 2018)
 - [x] 💬 [Living Without Atomic Clocks](https://www.cockroachlabs.com/blog/living-without-atomic-clocks/) (S Kimball 2016)