diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a2d45fe9c8d83de81d5859fd4836d3746170d73..f7ed796ccf4d970264ea8b0a2c6ab7461fd5ebc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,13 @@
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## v1.3.0 - 2021-22-05
+## v1.3.1 - 2021-09-25
+
+### `Fixed`
+
+* Fix bug in conda environment for cooltools (#109)
+
+## v1.3.0 - 2021-05-22
 
 * Change the `/tmp/` folder to `./tmp/` folder so that all tmp files are now in the work directory (#24)
 * Add `--hicpro_maps` options to generate the raw and normalized HiC-Pro maps. The default is now to use cooler
diff --git a/nextflow.config b/nextflow.config
index 7296cc2af450343641614486f3cc232b25c71243..2f8fd5776c8514fbf5dcf438b3121961a7757547 100644
--- a/nextflow.config
+++ b/nextflow.config
@@ -225,7 +225,7 @@ manifest {
   description = 'Analysis of Chromosome Conformation Capture data (Hi-C)'
   mainScript = 'main.nf'
   nextflowVersion = '>=20.04.0'
-  version = '1.3.0'
+  version = '1.3.1'
 }
 
 // Function to ensure that resource requirements don't go beyond