diff --git a/docker/chromium/Dockerfile b/docker/chromium/Dockerfile
index bab8476..5afae61 100644
--- a/docker/chromium/Dockerfile
+++ b/docker/chromium/Dockerfile
@@ -1,4 +1,7 @@
 FROM jess/chromium
 MAINTAINER developers@gns3.net
 
+# add a dummy layer to get an updated container timestamp
+RUN /bin/true
+
 VOLUME /data
diff --git a/docker/ipterm/cli/Dockerfile b/docker/ipterm/cli/Dockerfile
index dfa9009..d34eb8a 100644
--- a/docker/ipterm/cli/Dockerfile
+++ b/docker/ipterm/cli/Dockerfile
@@ -2,5 +2,8 @@
 
 FROM gns3/ipterm-base
 
+# add a dummy layer to get an updated container timestamp
+RUN /bin/true
+
 VOLUME [ "/root" ]
 CMD [ "sh", "-c", "cd; exec bash -i" ]
diff --git a/docker/kalilinux/Dockerfile b/docker/kalilinux/Dockerfile
index e013587..5282cf2 100644
--- a/docker/kalilinux/Dockerfile
+++ b/docker/kalilinux/Dockerfile
@@ -1,6 +1,6 @@
 FROM kalilinux/kali-rolling
 
-RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y tshark && apt-get install -y --no-install-recommends metasploit-framework nmap hydra sqlmap telnet openssh-client dnsutils yersinia ettercap-text-only cisco-global-exploiter cisco-auditing-tool snmp dsniff dnschef fping hping3 python-scapy\
+RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y tshark && apt-get install -y --no-install-recommends metasploit-framework nmap hydra sqlmap telnet openssh-client dnsutils yersinia ettercap-text-only cisco-global-exploiter cisco-auditing-tool snmp dsniff dnschef fping hping3 python3-scapy\
     && rm -rf /var/lib/apt/lists/*
 
 CMD /bin/bash 
diff --git a/docker/kalilinux/README.md b/docker/kalilinux/README.md
index 18ed695..2a503de 100644
--- a/docker/kalilinux/README.md
+++ b/docker/kalilinux/README.md
@@ -20,7 +20,7 @@ metasploit-framework
  * fping
  * hping3
  * tshark
- * python-scapy
+ * python3-scapy
  * yersinia
 
 ## Build and publish the Images
diff --git a/docker/kalilinux/index-1.html b/docker/kalilinux/index-1.html
index 3a1b27a..3f916b3 100644
--- a/docker/kalilinux/index-1.html
+++ b/docker/kalilinux/index-1.html
@@ -19,7 +19,7 @@ metasploit-framework
  * fping
  * hping3
  * tshark
- * python-scapy
+ * python3-scapy
  * yersinia</p>
 <h2 id="build-and-publish-the-images">Build and publish the Images</h2>
 <p>First the base image has to be created:</p>