diff --git a/docs/LightningModule/RequiredTrainerInterface.md b/docs/LightningModule/RequiredTrainerInterface.md
index a849988f..6070185a 100644
--- a/docs/LightningModule/RequiredTrainerInterface.md
+++ b/docs/LightningModule/RequiredTrainerInterface.md
@@ -77,7 +77,7 @@ class CoolModel(pl.LightningModule):
 
     def configure_optimizers(self):
         # REQUIRED
-        return [torch.optim.Adam(self.parameters(), lr=0.02)]
+        return torch.optim.Adam(self.parameters(), lr=0.02)
 
     @pl.data_loader
     def train_dataloader(self):