diff --git a/src/singularity_modules/deeptools/3.0.2/deeptools.def b/src/singularity_modules/deeptools/3.0.2/deeptools.def
index 586c60aac88eb09b43529f0185d66dabff11e7e7..e108aa37a3d41a2264bbc672419a42de4262a0c2 100644
--- a/src/singularity_modules/deeptools/3.0.2/deeptools.def
+++ b/src/singularity_modules/deeptools/3.0.2/deeptools.def
@@ -13,6 +13,7 @@ PACKAGES="build-essential \
              python3-dev \
              python3-wheel \
              zlib1g-dev \
+             procps \
              libcurl4-gnutls-dev"
 
 apt-get update && \
diff --git a/src/singularity_modules/deeptools/3.1.1/deeptools.def b/src/singularity_modules/deeptools/3.1.1/deeptools.def
index 7bc5798fce44b2e712698691e9e51e38dc0648bb..8bae622c762882f3e84198ab078de67c45b76531 100644
--- a/src/singularity_modules/deeptools/3.1.1/deeptools.def
+++ b/src/singularity_modules/deeptools/3.1.1/deeptools.def
@@ -13,6 +13,7 @@ PACKAGES="build-essential \
              python3-dev \
              python3-wheel \
              zlib1g-dev \
+             procps \
              libcurl4-gnutls-dev"
 
 apt-get update && \
diff --git a/src/singularity_modules/ucsc/375/ucsc.def b/src/singularity_modules/ucsc/375/ucsc.def
index d6c764ddd19a2b9e52c28c8f4b5b762a67861537..7dd798897d4a7aa9134109317a762d9b46cc30c8 100644
--- a/src/singularity_modules/ucsc/375/ucsc.def
+++ b/src/singularity_modules/ucsc/375/ucsc.def
@@ -13,6 +13,7 @@ PACKAGES="apt-utils \
              libssl-dev \
              libpng-dev \
              uuid-dev \
+             procps \
              libmysqlclient-dev \
              rsync"
 
diff --git a/src/singularity_modules/umi_tools/1.0.0/umi_tools.def b/src/singularity_modules/umi_tools/1.0.0/umi_tools.def
index d9ae3e204cc3763b69f5bdf042d8e8262d2b9a48..0eb75622cbcb60990e554cb4fb2572aaeaf0a9fb 100644
--- a/src/singularity_modules/umi_tools/1.0.0/umi_tools.def
+++ b/src/singularity_modules/umi_tools/1.0.0/umi_tools.def
@@ -11,6 +11,7 @@ PACKAGES="bash \
              python3 \
              python3-dev \
              python3-pip \
+             procps \
              gcc"
 
 apt-get update && \
diff --git a/src/singularity_modules/urqt/d62c1f8/urqt.def b/src/singularity_modules/urqt/d62c1f8/urqt.def
index 1f59d83eb8a109bd57529a8184464060fa0c4363..eba8af974d834d0dcb350200df805595d8118fda 100644
--- a/src/singularity_modules/urqt/d62c1f8/urqt.def
+++ b/src/singularity_modules/urqt/d62c1f8/urqt.def
@@ -11,6 +11,7 @@ PACKAGES="git \
 g++ \
 make \
 ca-certificates \
+procps \
 zlib1g-dev"
 
 apt-get update && \