diff --git a/install_postfixadmin.sh b/install_postfixadmin.sh
index f0c9940..0da5815 100755
--- a/install_postfixadmin.sh
+++ b/install_postfixadmin.sh
@@ -1327,7 +1327,7 @@ cat <<EOF >> ${APACHE_VHOST_DIR}/${WEBSITE_NAME}.conf 2>> $log_file
    # - linked to the resource being requested. By checking the referrer, the new 
    # - webpage can see where the request originated.
    # -
-   Header set  Referrer-Policy "strict-origin-when-cross-origin
+   Header set  Referrer-Policy "strict-origin-when-cross-origin"
 
    # - HTTP Strict Transport Security (HSTS)
    # -
diff --git a/install_roundcube.sh b/install_roundcube.sh
index e384320..9882779 100755
--- a/install_roundcube.sh
+++ b/install_roundcube.sh
@@ -1336,7 +1336,7 @@ cat <<EOF >> ${APACHE_VHOST_DIR}/${WEBSITE_NAME}.conf 2>> $log_file
    # - linked to the resource being requested. By checking the referrer, the new 
    # - webpage can see where the request originated.
    # -
-   Header set  Referrer-Policy "strict-origin-when-cross-origin
+   Header set  Referrer-Policy "strict-origin-when-cross-origin"
 
    # - HTTP Strict Transport Security (HSTS)
    # -