diff --git a/bucket/unison.json b/bucket/unison.json
index c5b6aa479e..ad3f5e4028 100644
--- a/bucket/unison.json
+++ b/bucket/unison.json
@@ -1,17 +1,17 @@
 {
-    "version": "2.53.4",
+    "version": "2.53.5",
     "description": "A file-synchronization tool.",
     "homepage": "https://www.cis.upenn.edu/~bcpierce/unison",
     "license": "GPL-3.0-only",
     "notes": "Compiled with same OCaml compiler version 4.12.1",
     "architecture": {
         "64bit": {
-            "url": "https://github.com/bcpierce00/unison/releases/download/v2.53.4/unison-2.53.4-windows-x86_64.zip",
-            "hash": "1276b54b870089e87b977931b66866f2a442631bc121d3504a38cc1c614fc4cd"
+            "url": "https://github.com/bcpierce00/unison/releases/download/v2.53.5/unison-2.53.5-windows-x86_64.zip",
+            "hash": "20ac71059a2497ce71b1ab5eb72ac0fb6910526d4c9885fe2aa85dec2edd0850"
         },
         "32bit": {
-            "url": "https://github.com/bcpierce00/unison/releases/download/v2.53.4/unison-2.53.4-windows-i386.zip",
-            "hash": "ae72e61b8214e0b761c832eba516f025e0b140a16c5f1b4143f48f48934bf668"
+            "url": "https://github.com/bcpierce00/unison/releases/download/v2.53.5/unison-2.53.5-windows-i386.zip",
+            "hash": "b3f537e6c5014eaa3a74481bd6e48db9c48d0ba4ba3e298ce8bcc8a6649cd386"
         }
     },
     "bin": [