diff --git a/.changes/unreleased/Fixes-20230706-123329.yaml b/.changes/unreleased/Fixes-20230706-123329.yaml
new file mode 100644
index 000000000..afda869d0
--- /dev/null
+++ b/.changes/unreleased/Fixes-20230706-123329.yaml
@@ -0,0 +1,6 @@
+kind: Fixes
+body: cast the port as an int
+time: 2023-07-06T12:33:29.799921-07:00
+custom:
+  Author: jiezhen-chen
+  Issue: "518"
diff --git a/dbt/adapters/redshift/connections.py b/dbt/adapters/redshift/connections.py
index 93bc798a4..dd2942b07 100644
--- a/dbt/adapters/redshift/connections.py
+++ b/dbt/adapters/redshift/connections.py
@@ -170,7 +170,7 @@ def get_connect_method(self):
         kwargs = {
             "host": self.credentials.host,
             "database": self.credentials.database,
-            "port": self.credentials.port if self.credentials.port else 5439,
+            "port": int(self.credentials.port) if self.credentials.port else int(5439),
             "auto_create": self.credentials.autocreate,
             "db_groups": self.credentials.db_groups,
             "region": self.credentials.region,
diff --git a/setup.py b/setup.py
index 3dd9e7913..56d4fa101 100644
--- a/setup.py
+++ b/setup.py
@@ -85,7 +85,7 @@ def _core_version(plugin_version: str = _plugin_version()) -> str:
         f"dbt-core~={_core_version()}",
         f"dbt-postgres~={_core_version()}",
         "boto3~=1.26.26",
-        "redshift-connector~=2.0.911,!=2.0.912",
+        "redshift-connector~=2.0.911",
         # installed via dbt-core but referenced directly; don't pin to avoid version conflicts with dbt-core
         "agate",
     ],