diff --git a/README.md b/README.md
index cab7d49..4d7755b 100644
--- a/README.md
+++ b/README.md
@@ -201,7 +201,7 @@ The `mask` subcommand makes it easy to create custom-masked reference genomes an
 ```bash
 hostile mask human.fasta lots-of-bacterial-genomes.fasta --threads 8
 ```
-You may wish to use one of the existing [reference genomes](#reference-genomes) as a starting point. Masking uses Minimap2's `asm10` preset to align the supplied target genomes with the reference genome, and bedtools to mask out all aligned regions. For Bowtie2—the default aligner for decontaminating short reads—you will also need to build an index before you can use your masked genome with Hostile.
+You may wish to use one of the existing [reference genomes](##reference-genomes--indexes) as a starting point. Masking uses Minimap2's `asm10` preset to align the supplied target genomes with the reference genome, and bedtools to mask out all aligned regions. For Bowtie2—the default aligner for decontaminating short reads—you will also need to build an index before you can use your masked genome with Hostile.
 
 ```bash
 bowtie2-build masked.fasta masked-index
diff --git a/src/hostile/__init__.py b/src/hostile/__init__.py
index 6db8a0b..5d13b5d 100644
--- a/src/hostile/__init__.py
+++ b/src/hostile/__init__.py
@@ -1,2 +1,2 @@
 """Accurate host read removal"""
-__version__ = "0.3.0"
+__version__ = "0.4.0"