diff --git a/hooks/horizon_hooks.py b/hooks/horizon_hooks.py
index 66ee9a92..992292ba 100755
--- a/hooks/horizon_hooks.py
+++ b/hooks/horizon_hooks.py
@@ -479,8 +479,13 @@ def dashboard_relation_changed():
         'vip': config('vip'),
     }
 
-    for rel_id in relations:
-        relation_set(rel_id, relation_settings=relation_settings, app=True)
+    if is_leader():
+        log("Setting dashboard access information on 'dashboard' relation",
+            level="INFO")
+        for rel_id in relations:
+            relation_set(rel_id, relation_settings=relation_settings, app=True)
+    else:
+        log("Skipping relation_set, because not leader.", level="DEBUG")
 
 
 def main():
diff --git a/unit_tests/test_horizon_hooks.py b/unit_tests/test_horizon_hooks.py
index 29d55e42..36adcff2 100644
--- a/unit_tests/test_horizon_hooks.py
+++ b/unit_tests/test_horizon_hooks.py
@@ -459,13 +459,15 @@ class TestHorizonHooks(CharmTestCase):
         _service_reload.assert_called_with('apache2')
         self.enable_ssl.assert_called_with()
 
-    def test_dashboard_relation_changed(self):
+    @patch.object(hooks, 'is_leader')
+    def test_dashboard_relation_changed(self, is_leader):
         self.relation_ids.return_value = None
         hooks.dashboard_relation_changed()
 
         self.test_config.set('os-public-hostname', 'mydashboard.local')
         self.test_config.set('vip', '1.2.3.4')
         self.relation_ids.return_value = ['dashboard:0']
+        is_leader.return_value = True
         hooks.dashboard_relation_changed()
 
         self.relation_set.assert_called_with(
@@ -474,3 +476,8 @@ class TestHorizonHooks(CharmTestCase):
                                'vip': '1.2.3.4'},
             app=True,
         )
+
+        self.relation_set.reset_mock()
+        is_leader.return_value = False
+        hooks.dashboard_relation_changed()
+        self.relation_set.assert_not_called()