diff --git a/src/util.js b/src/util.js
index f157e9e9..09e6d0ee 100644
--- a/src/util.js
+++ b/src/util.js
@@ -106,7 +106,13 @@ class Logger {
         }
         module = module.toUpperCase();
         level = level.toUpperCase();
-        const now = dayjs.tz(new Date()).format();
+        let now;
+        if (dayjs.tz) {
+            now = dayjs.tz(new Date()).format();
+        }
+        else {
+            now = dayjs().format();
+        }
         const formattedMessage = (typeof msg === "string") ? `${now} [${module}] ${level}: ${msg}` : msg;
         if (level === "INFO") {
             console.info(formattedMessage);
diff --git a/src/util.ts b/src/util.ts
index 6d3aabeb..99038c8d 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -122,7 +122,12 @@ class Logger {
         module = module.toUpperCase();
         level = level.toUpperCase();
 
-        const now = dayjs.tz(new Date()).format();
+        let now;
+        if (dayjs.tz) {
+            now = dayjs.tz(new Date()).format();
+        } else {
+            now = dayjs().format();
+        }
         const formattedMessage = (typeof msg === "string") ? `${now} [${module}] ${level}: ${msg}` : msg;
 
         if (level === "INFO") {