diff --git a/README.md b/README.md
index 8e88003..d760d95 100644
--- a/README.md
+++ b/README.md
@@ -368,7 +368,7 @@ It takes 4.676 seconds to align all the sentences.
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-### Post-processing
+## Post-processing
 
 Post-processing means manually correcting the wrong alignments generated by automatic aligners. The human validated sentence pairs can then be loaded into a translation memory software (e.g. [OmegaT](https://omegat.org/)) or bilingual concordancer (e.g. [Paraconc](https://paraconc.com/)), enabling translators to search the corresponding translation units and improve translation quality, or help researchers to carry out corpus-based translation studies.