diff --git a/conf/yarn b/conf/yarn
index 52d99447..65d914b8 100755
--- a/conf/yarn
+++ b/conf/yarn
@@ -5,5 +5,10 @@ curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key --keyring /usr/share
 
 mv /etc/apt/sources.list.d/yarn.list.disabled /etc/apt/sources.list.d/yarn.list
 
+YARN="yarn"
+if [[ -n "$YARN_VER" ]]; then
+    YARN="$YARN=YARN_VER"
+fi
+
 apt-get update
-DEBIAN_FRONTEND=noninteractive apt-get install --assume-yes yarn
+DEBIAN_FRONTEND=noninteractive apt-get install --assume-yes "$YARN"
diff --git a/mk/turnkey.mk b/mk/turnkey.mk
index be27f7d7..5b32b4f6 100644
--- a/mk/turnkey.mk
+++ b/mk/turnkey.mk
@@ -6,7 +6,7 @@ HOSTNAME ?= $(shell basename "$(shell pwd)")
 # general TKL vars
 CONF_VARS += HOSTNAME ROOT_PASS NONFREE BACKPORTS_NONFREE TKL_TESTING BACKPORTS
 # set specific software versions
-CONF_VARS += PHP_VERSION RUBY_VER NODE_VER
+CONF_VARS += PHP_VERSION RUBY_VER NODE_VER YARN_VER
 # Webmin/firewall related
 CONF_VARS += WEBMIN_THEME WEBMIN_FW_TCP_INCOMING WEBMIN_FW_TCP_INCOMING_REJECT WEBMIN_FW_UDP_INCOMING WEBMIN_FW_NAT_EXTRA WEBMIN_FW_MANGLE_EXTRA
 # these are needed to control styling of credits (e.g., conf/apache-credit)