diff --git a/Dockerfile b/Dockerfile
index bf45166..b49150b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,5 +5,7 @@ WORKDIR /annotation-tools
 COPY requirements.txt requirements.txt
 RUN pip3 install -r requirements.txt
 
+RUN apt-get update && apt-get install procps -y
+
 COPY . .
 # NOTE: annotation_suite_wrapper.sh won't work without annotation.jar (https://github.com/genome-nexus/genome-nexus-annotation-pipeline) that is not included in the container.