diff --git a/dbt/adapters/snowflake/connections.py b/dbt/adapters/snowflake/connections.py
index 1d6e31c93..aca115b4b 100644
--- a/dbt/adapters/snowflake/connections.py
+++ b/dbt/adapters/snowflake/connections.py
@@ -105,6 +105,7 @@ def __post_init__(self):
                     base_msg="Authenticator is not set to oauth, but an oauth-only parameter is set! Did you mean to set authenticator: oauth?"
                 )
             )
+        self.account = self.account.replace("_", "-")
 
     @property
     def type(self):
diff --git a/tests/unit/test_connections.py b/tests/unit/test_connections.py
index 555091c57..dd452b3cb 100644
--- a/tests/unit/test_connections.py
+++ b/tests/unit/test_connections.py
@@ -23,3 +23,16 @@ def test_connections_does_not_set_logs_in_response_to_env_var(monkeypatch):
 
     assert log_mock.debug.call_count == 0
     assert log_mock.set_adapter_dependency_log_level.call_count == 0
+
+
+def test_connnections_credentials_replaces_underscores_with_hyphens():
+    credentials = {
+        "account": "account_id_with_underscores",
+        "user": "user",
+        "password": "password",
+        "database": "database",
+        "warehouse": "warehouse",
+        "schema": "schema",
+    }
+    creds = connections.SnowflakeCredentials(**credentials)
+    assert creds.account == "account-id-with-underscores"