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
diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 99b670698336ef9175332f45391c8b9468aac1b2..42acbbe7430ef41905570a9570fe0e1431818d66 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -267,6 +267,9 @@ packages:
   py-uproot:
     require:
     - '@5.0.5'
+  py-wurlitzer:
+    require:
+    - '@3.0.2'
   py-yapf:
     require:
     - '@0.30.0'