diff --git a/spack-environment/dev/spack.yaml b/spack-environment/dev/spack.yaml
index da0d2c0090e64cfa75146b2ee7134b5f04d10743..20b183d058f359fff6889e919fd2d2a9d87189db 100644
--- a/spack-environment/dev/spack.yaml
+++ b/spack-environment/dev/spack.yaml
@@ -71,6 +71,7 @@ spack:
     - py-seaborn
     - py-toml
     - py-uproot
+    - py-wurlitzer
     - py-yapf
     - root
     - spdlog