diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11d680df693..b00f600ac6a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,7 @@ Contributors:
 
 ### Fixes
 - Fix bug causing empty node level meta, snapshot config errors ([#4459](https://github.com/dbt-labs/dbt-core/issues/4459), [#4726](https://github.com/dbt-labs/dbt-core/pull/4726))
+- Fix slow `dbt run` when using Postgres adapter, by deduplicating relations in `postgres_get_relations` ([#3058](https://github.com/dbt-labs/dbt-core/issues/3058), [#4521](https://github.com/dbt-labs/dbt-core/pull/4521))
 
 ## dbt-core 1.0.3 (TBD)
 
diff --git a/plugins/postgres/dbt/include/postgres/macros/relations.sql b/plugins/postgres/dbt/include/postgres/macros/relations.sql
index cc971f88932..a553f768148 100644
--- a/plugins/postgres/dbt/include/postgres/macros/relations.sql
+++ b/plugins/postgres/dbt/include/postgres/macros/relations.sql
@@ -22,7 +22,7 @@
         from pg_class
     ),
     dependency as (
-        select
+        select distinct
             pg_depend.objid as id,
             pg_depend.refobjid as ref
         from pg_depend