diff --git a/Tasks/ArchiveFiles/archivefiles.ts b/Tasks/ArchiveFiles/archivefiles.ts
index 709a5753f8a6..ee358afed93d 100644
--- a/Tasks/ArchiveFiles/archivefiles.ts
+++ b/Tasks/ArchiveFiles/archivefiles.ts
@@ -80,9 +80,9 @@ function sevenZipArchive(archive: string, compression: string, files: string[])
     sevenZip.arg('a');
     sevenZip.arg('-t' + compression);
 
-    const sevenZipCompression = tl.getInput('sevenZipCompression', false);    
-    if(sevenZipCompression) {
-        sevenZip.arg('-mx=' + sevenZipCompression);
+    const sevenZipCompression = tl.getInput('sevenZipCompression', false);
+    if (sevenZipCompression) {
+        sevenZip.arg('-mx=' + mapSevenZipCompressionLevel(sevenZipCompression));
     }
 
     sevenZip.arg(archive);
@@ -92,6 +92,26 @@ function sevenZipArchive(archive: string, compression: string, files: string[])
     return handleExecResult(sevenZip.execSync(getOptions()), archive);
 }
 
+// map from YAML-friendly value to 7-Zip numeric value
+function mapSevenZipCompressionLevel(sevenZipCompression: string) {    
+    switch (sevenZipCompression) {
+        case "ultra":
+            return "9";
+        case "maximum":
+            return "7";
+        case "normal":
+            return "5";
+        case "fast":
+            return "3";
+        case "fastest":
+            return "1";
+        case "none":
+            return "0";
+        default:
+            return "5";
+    }
+}
+
 // linux & mac only
 function zipArchive(archive: string, files: string[]) {
     tl.debug('Creating archive with zip: ' + archive);
diff --git a/Tasks/ArchiveFiles/task.json b/Tasks/ArchiveFiles/task.json
index 308f036e0962..1cc0e4eb94e8 100644
--- a/Tasks/ArchiveFiles/task.json
+++ b/Tasks/ArchiveFiles/task.json
@@ -17,7 +17,7 @@
     "demands": [],
     "version": {
         "Major": 2,
-        "Minor": 128,
+        "Minor": 135,
         "Patch": 0
     },
     "groups": [
@@ -70,12 +70,12 @@
             "groupName": "archive",
             "visibleRule": "archiveType = 7z",
             "options": {
-                "9": "Ultra",
-                "7": "Maximum",
-                "5": "Normal",
-                "3": "Fast",
-                "1": "Fastest",
-                "0": "None"
+                "ultra": "Ultra",
+                "maximum": "Maximum",
+                "normal": "Normal",
+                "fast": "Fast",
+                "fastest": "Fastest",
+                "none": "None"
             }
         },
         {
diff --git a/Tasks/ArchiveFiles/task.loc.json b/Tasks/ArchiveFiles/task.loc.json
index 267cb9912c8c..c506014bedd7 100644
--- a/Tasks/ArchiveFiles/task.loc.json
+++ b/Tasks/ArchiveFiles/task.loc.json
@@ -17,7 +17,7 @@
   "demands": [],
   "version": {
     "Major": 2,
-    "Minor": 128,
+    "Minor": 135,
     "Patch": 0
   },
   "groups": [
@@ -70,12 +70,12 @@
       "groupName": "archive",
       "visibleRule": "archiveType = 7z",
       "options": {
-        "0": "None",
-        "1": "Fastest",
-        "3": "Fast",
-        "5": "Normal",
-        "7": "Maximum",
-        "9": "Ultra"
+        "ultra": "Ultra",
+        "maximum": "Maximum",
+        "normal": "Normal",
+        "fast": "Fast",
+        "fastest": "Fastest",
+        "none": "None"
       }
     },
     {