diff --git a/README.md b/README.md
index e4798d3..f1bedf0 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Hifiasm is an ultrafast haplotype-resolved de novo assembler based on PacBio Hif
 
 Hifiasm is a standalone and lightweight assembler, which does not need external libraries (except zlib). For large genomes, it can generate high-quality assembly in a few hours. Hifiasm has been tested on the following datasets:
 
-|Dataset         |GSize |  Cov |          Asm options |CPU time|Wall time|  RAM|unitig/contig N50<sup>[1]</sup>|
+|<sub>Dataset<sub>         |GSize |  Cov |          Asm options |CPU time|Wall time|  RAM|unitig/contig N50<sup>[1]</sup>|
 |:---------------|-----:|-----:|:---------------------|-------:|--------:|----:|----------------:|
 |[Human NA12878] |   3Gb|x28   |-k 40 -t 42 -r 2      |    200h|    5h32m|?114G|    93.5Kb/18.6Mb|
 |[Human HG002]   |   3Gb|x43   |-k 40 -t 42 -r 2      |   ?405h|  ?10h12m|?122G|       320kb/29Mb|