diff --git a/build/Dockerfile b/build/Dockerfile
index c2aec15..7bbb37a 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -20,7 +20,7 @@ EXPOSE 2143/tcp
 
 # Install dependencies and protonmail bridge
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends socat pass libsecret-1-0 ca-certificates \
+    && apt-get install -y --no-install-recommends procps socat pass libsecret-1-0 ca-certificates \
     && rm -rf /var/lib/apt/lists/*
 
 # Copy bash scripts