diff --git a/Dockerfile b/Dockerfile
index 34564dc..4dbfa7d 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -65,7 +65,9 @@ RUN set -ex \
     git \
     zsh \
     websocat \
-    swaks
+    swaks \
+    perl-crypt-ssleay \
+    perl-net-ssleay
 
 # Installing httpie ( https://httpie.io/docs#installation)
 RUN pip3 install --upgrade httpie
diff --git a/README.md b/README.md
index c4042ed..c14e257 100755
--- a/README.md
+++ b/README.md
@@ -171,6 +171,7 @@ To troubleshoot these issues, `netshoot` includes a set of powerful tools as rec
     scapy
     socat
     strace
+    swaks
     tcpdump
     tcptraceroute
     termshark
@@ -672,6 +673,7 @@ swaks --to user@example.com \
   --from fred@example.com --h-From: '"Fred Example" <fred@example.com>' \
   --auth CRAM-MD5 --auth-user me@example.com \
   --header-X-Test "test email" \
+  --tls \
   --data "Example body"
 ```