diff --git a/CI/ubuntu1604.Dockerfile b/CI/ubuntu1604.Dockerfile
index de1b1c647..ddcc11cb2 100644
--- a/CI/ubuntu1604.Dockerfile
+++ b/CI/ubuntu1604.Dockerfile
@@ -11,7 +11,7 @@ FROM ubuntu:16.04
 RUN \
   sed -i 's/# \(.*multiverse$\)/\1/g' /etc/apt/sources.list && \
   apt-get update && \
-  apt-get install -y git cmake qtbase5-dev build-essential libx11-dev libxtst-dev libgl1-mesa-dev libssl-dev libavahi-compat-libdnssd-dev && \
+  apt-get install -y git cmake qtbase5-dev qttools5-dev build-essential libx11-dev libxtst-dev libgl1-mesa-dev libssl-dev libavahi-compat-libdnssd-dev && \
   apt-get install -y debhelper devscripts
   
 # Set environment variables.
diff --git a/CI/ubuntu1804.Dockerfile b/CI/ubuntu1804.Dockerfile
index 733cbbd7e..c6369e772 100644
--- a/CI/ubuntu1804.Dockerfile
+++ b/CI/ubuntu1804.Dockerfile
@@ -11,7 +11,7 @@ FROM ubuntu:18.04
 RUN \
   sed -i 's/# \(.*multiverse$\)/\1/g' /etc/apt/sources.list && \
   apt-get update && \
-  apt-get install -y git cmake qtbase5-dev build-essential libx11-dev libxtst-dev libgl1-mesa-dev libssl-dev libavahi-compat-libdnssd-dev && \
+  apt-get install -y git cmake qtbase5-dev qttools5-dev build-essential libx11-dev libxtst-dev libgl1-mesa-dev libssl-dev libavahi-compat-libdnssd-dev && \
   apt-get install -y debhelper devscripts
 
 # Set environment variables.
diff --git a/CI/ubuntu1904.Dockerfile b/CI/ubuntu1904.Dockerfile
index 2e48cf4fc..705c2c1cd 100644
--- a/CI/ubuntu1904.Dockerfile
+++ b/CI/ubuntu1904.Dockerfile
@@ -11,7 +11,7 @@ FROM ubuntu:19.04
 RUN \
   sed -i 's/# \(.*multiverse$\)/\1/g' /etc/apt/sources.list && \
   apt-get update && \
-  apt-get install -y git cmake qtbase5-dev build-essential libx11-dev libxtst-dev libgl1-mesa-dev libssl-dev libavahi-compat-libdnssd-dev && \
+  apt-get install -y git cmake qtbase5-dev qttools5-dev build-essential libx11-dev libxtst-dev libgl1-mesa-dev libssl-dev libavahi-compat-libdnssd-dev && \
   apt-get install -y debhelper devscripts
   
 # Set environment variables.