diff --git a/bucket/z3.json b/bucket/z3.json
index 38abddf13a..c2f082e946 100644
--- a/bucket/z3.json
+++ b/bucket/z3.json
@@ -1,18 +1,18 @@
 {
-    "version": "4.11.2",
+    "version": "4.12.0",
     "description": "Theorem prover from Microsoft Research.",
     "homepage": "https://github.com/Z3Prover/z3",
     "license": "MIT",
     "architecture": {
         "64bit": {
-            "url": "https://github.com/Z3Prover/z3/releases/download/z3-4.11.2/z3-4.11.2-x64-win.zip",
-            "hash": "16c2006b017fbc302bc609ffe2a18e6fbfd083566947c92ce47bf7647029e397",
-            "extract_dir": "z3-4.11.2-x64-win"
+            "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"
         },
         "32bit": {
-            "url": "https://github.com/Z3Prover/z3/releases/download/z3-4.11.2/z3-4.11.2-x86-win.zip",
-            "hash": "077759cc4bacdb096260f670bbcad5514abae10776b268767d2e04aed5e9468f",
-            "extract_dir": "z3-4.11.2-x86-win"
+            "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"
         }
     },
     "bin": "bin\\z3.exe",