diff --git a/bucket/y-cruncher.json b/bucket/y-cruncher.json
index 73fd6c1c8f..49f2a461f4 100644
--- a/bucket/y-cruncher.json
+++ b/bucket/y-cruncher.json
@@ -1,18 +1,18 @@
 {
-    "version": "0.8.6.9545",
+    "version": "0.8.6.9545b",
     "description": "Scalable multi-threaded benchmark calculating multiple mathematical constants to trillions of digits.",
     "homepage": "http://www.numberworld.org/y-cruncher/",
     "license": {
         "identifier": "Freeware",
         "url": "http://www.numberworld.org/y-cruncher/license.html"
     },
-    "url": "http://www.numberworld.org/y-cruncher/y-cruncher%20v0.8.6.9545.zip",
-    "hash": "2307316c847db572848b7047ffa353cf64498ca521b1679210a0d9267ed9fd8f",
+    "url": "http://www.numberworld.org/y-cruncher/y-cruncher%20v0.8.6.9545b.zip",
+    "hash": "93e39c7ad3ae2ed559ad61a7bc5b35e82ad8f1124debe9f63f20e36fda0be7b7",
     "extract_dir": "y-cruncher v0.8.6.9545",
     "bin": "y-cruncher.exe",
-    "checkver": "y-cruncher v([\\d.]+)\\.zip",
+    "checkver": "y-cruncher v((?<ver>[\\d.]+)(?<rel>\\w{0,1}))\\.zip",
     "autoupdate": {
         "url": "http://www.numberworld.org/y-cruncher/y-cruncher%20v$version.zip",
-        "extract_dir": "y-cruncher v$version"
+        "extract_dir": "y-cruncher v$matchVer"
     }
 }