diff --git a/README.md b/README.md
index dda638e..9395371 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,7 @@ A curated list of awesome PostgreSQL software, libraries, tools and resources, i
 * [PGStrom](https://wiki.postgresql.org/wiki/PGStrom) - Extension to offload CPU intensive workloads to GPU.
 * [plpgsql\_check](https://github.com/okbob/plpgsql_check) - Extension that allows to check plpgsql source code.
 * [PostGIS](http://postgis.net/) - Spatial and Geographic objects for PostgreSQL.
+* [PG_Themis](https://github.com/cossacklabs/pg_themis) - Postgres binding as extension for crypto library Themis, providing various security services on PgSQL's side.
 * [zomboDB](https://github.com/zombodb/zombodb) - Extension that enables efficient full-text searching via the use of indexes backed by Elasticsearch.
 
 ### Optimization