diff --git a/bucket/z3.json b/bucket/z3.json
index c2f082e946..6854181286 100644
--- a/bucket/z3.json
+++ b/bucket/z3.json
@@ -1,18 +1,18 @@
 {
-    "version": "4.12.0",
+    "version": "4.12.1",
     "description": "Theorem prover from Microsoft Research.",
     "homepage": "https://github.com/Z3Prover/z3",
     "license": "MIT",
     "architecture": {
         "64bit": {
-            "url": "https://github.com/Z3Prover/z3/releases/download/z3-4.12.0/z3-4.12.0-x64-win.zip",
-            "hash": "3b85da327d5112f6b96855d8dcf8c2af41f70aca2a36eb403a8a349a5af7c0e2",
-            "extract_dir": "z3-4.12.0-x64-win"
+            "url": "https://github.com/Z3Prover/z3/releases/download/z3-4.12.1/z3-4.12.1-x64-win.zip",
+            "hash": "ce2d658d007c4f5873d2279bd031d4e72500b388e1ef2d716bd5f86af19b20d2",
+            "extract_dir": "z3-4.12.1-x64-win"
         },
         "32bit": {
-            "url": "https://github.com/Z3Prover/z3/releases/download/z3-4.12.0/z3-4.12.0-x86-win.zip",
-            "hash": "6ff163e75d38c575669aeae5b4ee58ba58fcd9e4a537bf7ddf4b08d911f4789b",
-            "extract_dir": "z3-4.12.0-x64-win"
+            "url": "https://github.com/Z3Prover/z3/releases/download/z3-4.12.1/z3-4.12.1-x86-win.zip",
+            "hash": "1fbe8e2a87f42ca6f3348b8c48a1ffcd8fc376ac3144c9b588a5452de01ca2ef",
+            "extract_dir": "z3-4.12.1-x64-win"
         }
     },
     "bin": "bin\\z3.exe",