diff --git a/server/server.js b/server/server.js
index d2af1cf41..d36ca662e 100644
--- a/server/server.js
+++ b/server/server.js
@@ -641,6 +641,10 @@ let needSetup = false;
                 let notificationIDList = monitor.notificationIDList;
                 delete monitor.notificationIDList;
 
+                // Ensure status code ranges are strings
+                if (!monitor.accepted_statuscodes.every((code) => typeof code === "string")) {
+                    throw new Error("Accepted status codes are not all strings");
+                }
                 monitor.accepted_statuscodes_json = JSON.stringify(monitor.accepted_statuscodes);
                 delete monitor.accepted_statuscodes;
 
@@ -706,6 +710,11 @@ let needSetup = false;
                     removeGroupChildren = true;
                 }
 
+                // Ensure status code ranges are strings
+                if (!monitor.accepted_statuscodes.every((code) => typeof code === "string")) {
+                    throw new Error("Accepted status codes are not all strings");
+                }
+
                 bean.name = monitor.name;
                 bean.description = monitor.description;
                 bean.parent = monitor.parent;
diff --git a/server/util-server.js b/server/util-server.js
index 985fddb63..8354b5609 100644
--- a/server/util-server.js
+++ b/server/util-server.js
@@ -720,7 +720,6 @@ exports.checkCertificate = function (res) {
  * @param {number} status The status code to check
  * @param {string[]} acceptedCodes An array of accepted status codes
  * @returns {boolean} True if status code within range, false otherwise
- * @throws {Error} Will throw an error if the provided status code is not a valid range string or code string
  */
 exports.checkStatusCode = function (status, acceptedCodes) {
     if (acceptedCodes == null || acceptedCodes.length === 0) {
@@ -728,6 +727,11 @@ exports.checkStatusCode = function (status, acceptedCodes) {
     }
 
     for (const codeRange of acceptedCodes) {
+        if (typeof codeRange !== "string") {
+            log.error("monitor", `Accepted status code not a string. ${codeRange} is of type ${typeof codeRange}`);
+            continue;
+        }
+
         const codeRangeSplit = codeRange.split("-").map(string => parseInt(string));
         if (codeRangeSplit.length === 1) {
             if (status === codeRangeSplit[0]) {
@@ -738,7 +742,8 @@ exports.checkStatusCode = function (status, acceptedCodes) {
                 return true;
             }
         } else {
-            throw new Error("Invalid status code range");
+            log.error("monitor", `${codeRange} is not a valid status code range`);
+            continue;
         }
     }