diff --git a/ronin-install.sh b/ronin-install.sh
index ff7a226..2a265a3 100755
--- a/ronin-install.sh
+++ b/ronin-install.sh
@@ -383,6 +383,39 @@ function install_dependencies()
 	fi
 }
 
+#
+# Install nmap if it's not already installed.
+#
+function auto_install_nmap()
+{
+	if ! command -v nmap >/dev/null; then
+		log "Installing nmap ..."
+		install_packages nmap || fail "Failed to install nmap!"
+	fi
+}
+
+#
+# Install masscan if it's not already installed.
+#
+function auto_install_masscan()
+{
+	if ! command -v masscan >/dev/null; then
+		log "Installing masscan ..."
+		install_packages masscan || fail "Failed to install masscan!"
+	fi
+}
+
+#
+# Install GraphViz if it's not already installed.
+#
+function auto_install_graphviz()
+{
+	if ! command -v dot >/dev/null; then
+		log "Installing GraphViz ..."
+		install_packages graphviz || fail "Failed to install graphviz!"
+	fi
+}
+
 #
 # Print the --help usage.
 #
@@ -447,6 +480,13 @@ auto_install_pkg_config
 auto_install_ruby
 install_dependencies
 
+# TODO: remove prerelease check once ronin-2.1.0 is finally released
+if [[ "$prerelease" == "true" ]]; then
+	auto_install_nmap
+	auto_install_masscan
+	auto_install_graphviz
+fi
+
 if ! command -v ronin >/dev/null; then
 	if [[ "$prerelease" == "true" ]]; then
 		log "Installing ronin pre-release. This may take a while ..."
diff --git a/test/ronin_install_test.sh b/test/ronin_install_test.sh
index 839bb39..89c4968 100755
--- a/test/ronin_install_test.sh
+++ b/test/ronin_install_test.sh
@@ -53,6 +53,23 @@ function test_git_install()
 	assertCommandInstalled "did not successfully install git" 'git'
 }
 
+# TODO: uncomment when ronin-2.1.0 is finally released.
+#
+# function test_nmap_install()
+# {
+# 	assertCommandInstalled "did not successfully install nmap" 'nmap'
+# }
+#
+# function test_masscan_install()
+# {
+# 	assertCommandInstalled "did not successfully install masscan" 'masscan'
+# }
+#
+# function test_graphviz_install()
+# {
+# 	assertCommandInstalled "did not successfully install GraphViz" 'dot'
+# }
+
 function test_ronin_install()
 {
 	assertCommandInstalled "did not successfully install ronin" 'ronin'