diff --git a/locale/en/locale.po b/locale/en/locale.po
index 79bd52f509f..91c2f8adb89 100644
--- a/locale/en/locale.po
+++ b/locale/en/locale.po
@@ -1540,3 +1540,19 @@ msgstr "This search implementation does not allow per-press re-indexing."
 
 msgid "search.cli.rebuildIndex.unknownPress"
 msgstr "The given press path \"{$pressPath}\" could not be resolved to a press."
+
+msgid "site.upgradeAvailable.admin"
+msgstr ""
+"There is a new version of OMP available! You are currently using OMP "
+"{$currentVersion}. The most recent version is OMP {$latestVersion}. Please "
+"visit <a href=\"https://pkp.sfu.ca/omp_download\" target=\"_new\">the PKP "
+"website</a> to download the most recent version and find upgrade instructions."
+
+msgid "site.upgradeAvailable.manager"
+msgstr ""
+"There is a new version of OMP available! You are currently using OMP "
+"{$currentVersion}. The most recent version is OMP {$latestVersion}. Please "
+"contact your Site Administrator ({$siteAdminName}, <a href=\""
+"mailto:{$siteAdminEmail}\">{$siteAdminEmail}</a>) to notify them of this new "
+"release. More information can be found <a href=\"https://pkp.sfu.ca/omp_download\"
+"omp_download/\" target=\"_new\">on the PKP website</a>."