diff --git a/Dockerfile b/Dockerfile
index 4f02ef3..5da9dba 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,6 +34,7 @@ RUN apt-get update && apt-get install -yq --no-install-recommends \
     unzip \
     vim \
     wget \
+    pigz \
     fonts-texgyre \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
diff --git a/requirements.txt b/requirements.txt
index 5f32c22..d47f925 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,6 @@ nbconvert==6.5.0
 openpyxl
 xlrd
 statsmodels
-onecodex[all,reports]==0.19.3
+onecodex[all,reports]==0.19.4
 taxonomy
 widgetsnbextension