diff --git a/bucket/biber.json b/bucket/biber.json
index 3186b8b243..2d608814b4 100644
--- a/bucket/biber.json
+++ b/bucket/biber.json
@@ -1,5 +1,5 @@
 {
-    "version": "2.20",
+    "version": "2.21",
     "description": "Biber is a BibTeX replacement for users of biblatex, with full Unicode support.",
     "license": "Artistic-2.0",
     "homepage": "https://biblatex-biber.sourceforge.net/",
@@ -9,11 +9,7 @@
     "architecture": {
         "64bit": {
             "url": "https://downloads.sourceforge.net/project/biblatex-biber/biblatex-biber/current/binaries/Windows/biber-MSWIN64.zip",
-            "hash": "sha1:c05d45fdfbe8a8e15244a6b24dadef3d6c7f1f36"
-        },
-        "32bit": {
-            "url": "https://downloads.sourceforge.net/project/biblatex-biber/biblatex-biber/current/binaries/Windows/biber-MSWIN32.zip",
-            "hash": "sha1:bead34ed7f31b4203c58407feb2ea8e5a0966556"
+            "hash": "sha1:ee3ffda40abd7d420427620d6db3203923cda4c7"
         }
     },
     "bin": "biber.exe",
@@ -22,9 +18,6 @@
         "architecture": {
             "64bit": {
                 "url": "https://downloads.sourceforge.net/project/biblatex-biber/biblatex-biber/current/binaries/Windows/biber-MSWIN64.zip"
-            },
-            "32bit": {
-                "url": "https://downloads.sourceforge.net/project/biblatex-biber/biblatex-biber/current/binaries/Windows/biber-MSWIN32.zip"
             }
         }
     }