diff --git a/MANIFEST.in b/MANIFEST.in
index c1b54649..fb9af1fe 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,6 @@
 include LICENSE
 include README.md
+include brainglobe_workflows/niftyreg_defaults.json
 exclude .pre-commit-config.yaml
 
 recursive-include brainglobe_workflows *.py