diff --git a/package-lock.json b/package-lock.json
index f51088d..255a302 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
       "hasInstallScript": true,
       "license": "ISC",
       "dependencies": {
-        "@sasjs/utils": "2.42.0",
+        "@sasjs/utils": "2.44.0",
         "axios": "0.26.0",
         "axios-cookiejar-support": "1.0.1",
         "form-data": "4.0.0",
@@ -1142,9 +1142,9 @@
       }
     },
     "node_modules/@sasjs/utils": {
-      "version": "2.42.0",
-      "resolved": "https://registry.npmjs.org/@sasjs/utils/-/utils-2.42.0.tgz",
-      "integrity": "sha512-Y69l89PYNF/h9xvVH72om/39xA+cY80bhiVLzp/fJb3BlvzCf4RNswBBanUOv2I5JNa7gPpJuE7mEiXOlhD3eg==",
+      "version": "2.44.0",
+      "resolved": "https://registry.npmjs.org/@sasjs/utils/-/utils-2.44.0.tgz",
+      "integrity": "sha512-hpC4erHYA8Mcb38mzxFEP0cXehfa0iKeqSW2d9MmxZ9g2qpy0BU6xyZJohN9kOiafXo5H359ndNKsg4DOq5YgA==",
       "hasInstallScript": true,
       "dependencies": {
         "@types/fs-extra": "9.0.13",
@@ -13870,9 +13870,9 @@
       }
     },
     "@sasjs/utils": {
-      "version": "2.42.0",
-      "resolved": "https://registry.npmjs.org/@sasjs/utils/-/utils-2.42.0.tgz",
-      "integrity": "sha512-Y69l89PYNF/h9xvVH72om/39xA+cY80bhiVLzp/fJb3BlvzCf4RNswBBanUOv2I5JNa7gPpJuE7mEiXOlhD3eg==",
+      "version": "2.44.0",
+      "resolved": "https://registry.npmjs.org/@sasjs/utils/-/utils-2.44.0.tgz",
+      "integrity": "sha512-hpC4erHYA8Mcb38mzxFEP0cXehfa0iKeqSW2d9MmxZ9g2qpy0BU6xyZJohN9kOiafXo5H359ndNKsg4DOq5YgA==",
       "requires": {
         "@types/fs-extra": "9.0.13",
         "@types/prompts": "2.0.13",
diff --git a/package.json b/package.json
index e2e4dc5..2be4b9a 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
   },
   "main": "index.js",
   "dependencies": {
-    "@sasjs/utils": "2.42.0",
+    "@sasjs/utils": "2.44.0",
     "axios": "0.26.0",
     "axios-cookiejar-support": "1.0.1",
     "form-data": "4.0.0",
diff --git a/src/test/utils/formatDataForRequest.spec.ts b/src/test/utils/formatDataForRequest.spec.ts
index 9a74998..eee87a4 100644
--- a/src/test/utils/formatDataForRequest.spec.ts
+++ b/src/test/utils/formatDataForRequest.spec.ts
@@ -62,7 +62,7 @@ describe('formatDataForRequest', () => {
 
     expect(() => formatDataForRequest(tableWithMissingValues)).toThrow(
       new Error(
-        'Special missing value can only be a single character from A to Z or _'
+        `A Special missing value can only be a single character from 'A' to 'Z', '_', '.[a-z]', '._'`
       )
     )
   })
diff --git a/src/utils/convertToCsv.ts b/src/utils/convertToCsv.ts
index bab7788..c792375 100644
--- a/src/utils/convertToCsv.ts
+++ b/src/utils/convertToCsv.ts
@@ -1,3 +1,5 @@
+import { isSpecialMissing } from '@sasjs/utils'
+
 /**
  * Converts the given JSON object array to a CSV string.
  * @param data - the array of JSON objects to convert.
@@ -18,7 +20,6 @@ export const convertToCSV = (
   let headers: string[] = []
   let csvTest
   let invalidString = false
-  const specialMissingValueRegExp = /^[a-z_]{1}$/i
 
   if (formats) {
     headers = Object.keys(formats).map((key) => `${key}:${formats![key]}`)
@@ -36,7 +37,7 @@ export const convertToCSV = (
           hasNullOrNumber = true
         } else if (
           typeof row[field] === 'string' &&
-          specialMissingValueRegExp.test(row[field])
+          isSpecialMissing(row[field])
         ) {
           hasSpecialMissingString = true
         }
@@ -130,10 +131,10 @@ export const convertToCSV = (
       value = currentCell === null ? '' : currentCell
 
       if (formats && formats[fieldName] === 'best.') {
-        if (value && !specialMissingValueRegExp.test(value)) {
+        if (value && !isSpecialMissing(value)) {
           console.log(`🤖[value]🤖`, value)
           throw new Error(
-            'Special missing value can only be a single character from A to Z or _'
+            `A Special missing value can only be a single character from 'A' to 'Z', '_', '.[a-z]', '._'`
           )
         }