diff --git a/sampler_requirements.txt b/sampler_requirements.txt
index 69a03701aa337928a0112046a74f6a44677487fe..443a96ab2a1ea2f4f7474436437a43d2b4afa0e5 100644
--- a/sampler_requirements.txt
+++ b/sampler_requirements.txt
@@ -9,3 +9,4 @@ kombine
 ultranest>=3.0.0
 dnest4
 nessai>=0.2.3
+schwimmbad