diff --git a/bucket/rtools.json b/bucket/rtools.json
index 8252a26ad0..be130fdd63 100644
--- a/bucket/rtools.json
+++ b/bucket/rtools.json
@@ -1,5 +1,5 @@
 {
-    "version": "4.3.5550.5548",
+    "version": "4.3.5863.5818",
     "description": "Tools for building packages for R under Microsoft Windows, or for building R itself.",
     "homepage": "https://cloud.r-project.org/bin/windows/Rtools",
     "license": "BSD-3-Clause",
@@ -10,8 +10,8 @@
     ],
     "architecture": {
         "64bit": {
-            "url": "https://cloud.r-project.org/bin/windows/Rtools/rtools43/files/rtools43-5550-5548.exe",
-            "hash": "bf93cf85b109be80586467f586d7e6294f54c5f11ddc6b930a91e28e03e67b74"
+            "url": "https://cloud.r-project.org/bin/windows/Rtools/rtools43/files/rtools43-5863-5818.exe",
+            "hash": "4e2ea954260bcf50d33a13fc46c8ca41e09adf03419b79786b56ae1d35f6e580"
         }
     },
     "innosetup": true,