diff --git a/bucket/z3.json b/bucket/z3.json
index a81a2613b9..32a22562ea 100644
--- a/bucket/z3.json
+++ b/bucket/z3.json
@@ -1,18 +1,18 @@
 {
-    "version": "4.13.3",
+    "version": "4.13.4",
     "description": "Theorem prover from Microsoft Research.",
     "homepage": "https://github.com/Z3Prover/z3",
     "license": "MIT",
     "architecture": {
         "64bit": {
-            "url": "https://github.com/Z3Prover/z3/releases/download/z3-4.13.3/z3-4.13.3-x64-win.zip",
-            "hash": "014e313f5aa414c48f36620a32eced705002fdc8c840ed8a1b51f186f0da0348",
-            "extract_dir": "z3-4.13.3-x64-win"
+            "url": "https://github.com/Z3Prover/z3/releases/download/z3-4.13.4/z3-4.13.4-x64-win.zip",
+            "hash": "0a36dd5654fe423d23a727c4570c9db9a315926a4301189b868b6eb9bfd5979d",
+            "extract_dir": "z3-4.13.4-x64-win"
         },
         "32bit": {
-            "url": "https://github.com/Z3Prover/z3/releases/download/z3-4.13.3/z3-4.13.3-x86-win.zip",
-            "hash": "1161897f3a43ac61c0969e3c7ccb94d8d39ae7f66f889ce1f784a705404ca204",
-            "extract_dir": "z3-4.13.3-x64-win"
+            "url": "https://github.com/Z3Prover/z3/releases/download/z3-4.13.4/z3-4.13.4-x86-win.zip",
+            "hash": "f9abc933523b329def3cb400f3d743285f1404417b03aa20032ea86f1be6bf3a",
+            "extract_dir": "z3-4.13.4-x64-win"
         }
     },
     "bin": "bin\\z3.exe",