diff --git a/download.json b/download.json
index 20f9df5..fd50623 100644
--- a/download.json
+++ b/download.json
@@ -12,5 +12,16 @@
             "url": "https://glavo.lanzouw.com/iVv313buq7ud",
             "sha256": "df31dc065ca74da63bbbb0f0d8343bbf68c5be72f3d3467044a12a7aa23767bc"
         }
+    },
+    "old": {
+        "version": "3.6.20",
+        "jar": {
+            "url": "https://github.com/HMCL-dev/HMCL/releases/download/v3.6.20/HMCL-3.6.20.jar",
+            "sha256": "691866221c8501e5a79ad61d87afa05019bde0389f867aa8425314d588aae759"
+        },
+        "exe": {
+            "url": "https://github.com/HMCL-dev/HMCL/releases/download/v3.6.20/HMCL-3.6.20.exe",
+            "sha256": "f3e65c5d928c8464a9591dfa4ac9075f6f9dbe74fa3e4075ea51b0f71b2612ca"
+        }
     }
 }
\ No newline at end of file