diff --git a/bucket/nixpacks.json b/bucket/nixpacks.json
index af9f14c109..49f85d66b2 100644
--- a/bucket/nixpacks.json
+++ b/bucket/nixpacks.json
@@ -1,5 +1,5 @@
 {
-    "version": "1.21.2",
+    "version": "1.21.3",
     "description": "Generate an OCI compliant image based off app source.",
     "homepage": "https://github.com/railwayapp/nixpacks",
     "license": "MIT",
@@ -8,12 +8,12 @@
     },
     "architecture": {
         "64bit": {
-            "url": "https://github.com/railwayapp/nixpacks/releases/download/v1.21.2/nixpacks-v1.21.2-x86_64-pc-windows-msvc.zip",
-            "hash": "3e366823615f226a3712f6d04c6eb70b7c9d20dcfd810c2395c3477d5b949fae"
+            "url": "https://github.com/railwayapp/nixpacks/releases/download/v1.21.3/nixpacks-v1.21.3-x86_64-pc-windows-msvc.zip",
+            "hash": "9147e06a5ed1598511c4fbd8f94b85aec8c1290f24223de8de55425267be5289"
         },
         "32bit": {
-            "url": "https://github.com/railwayapp/nixpacks/releases/download/v1.21.2/nixpacks-v1.21.2-i686-pc-windows-msvc.zip",
-            "hash": "44915bf8b13cf34f07f6e0773b4fe117ddab17c41293978dbd4957e522ccb7d0"
+            "url": "https://github.com/railwayapp/nixpacks/releases/download/v1.21.3/nixpacks-v1.21.3-i686-pc-windows-msvc.zip",
+            "hash": "93b91397f010bffd3d110db36d906126f56abeb665a24d217ceebf1b19328b8c"
         }
     },
     "bin": "nixpacks.exe",