diff --git a/README.md b/README.md
index 9915b6edda0820d5e714a9d4a5dc3fc436cea7ca..cf98fefd43afcd1dc877af78df0cd8519a0b88c5 100644
--- a/README.md
+++ b/README.md
@@ -82,7 +82,7 @@ when batch_size is large (16, 32, 64, 128), throughput_amp > throughput_tf32.
 
 <img src="https://github.com/xuagu37/Benchmark_nnU-Net_for_PyTorch/blob/main/figures/benchmark_throughput_batch_size.png" width="400">
 
-- Observation 2: The coefficient of variation of throughput for 100 iterations is smallest when batch_size = 128.  
+**Observation 2**: The coefficient of variation of throughput for 100 iterations is smallest when batch_size = 128.  
 
 <img src="https://github.com/xuagu37/Benchmark_nnU-Net_for_PyTorch/blob/main/figures/benchmark_throughput_cv.png" width="400">