diff --git a/bucket/boost.json b/bucket/boost.json
index a89a8add8f..3a8bb5041a 100644
--- a/bucket/boost.json
+++ b/bucket/boost.json
@@ -1,16 +1,16 @@
 {
-    "version": "1.86.0",
+    "version": "1.85.0",
     "description": "Boost C++ Libraries",
     "homepage": "https://www.boost.org/",
     "license": "BSL-1.0",
     "architecture": {
         "64bit": {
-            "url": "https://downloads.sourceforge.net/project/boost/boost-binaries/1.86.0/boost_1_86_0-msvc-14.3-64.exe",
-            "hash": "sha1:8bc24e0d887dc126f3babf6b8d091e52cd675f53"
+            "url": "https://downloads.sourceforge.net/project/boost/boost-binaries/1.85.0/boost_1_85_0-msvc-14.3-64.exe",
+            "hash": "sha1:144aa21a12784becc6db0ec46cd6dd9546138f5e"
         },
         "32bit": {
-            "url": "https://downloads.sourceforge.net/project/boost/boost-binaries/1.86.0/boost_1_86_0-msvc-14.3-32.exe",
-            "hash": "sha1:43cf4575648376de84856a4beb3bef795e819946"
+            "url": "https://downloads.sourceforge.net/project/boost/boost-binaries/1.85.0/boost_1_85_0-msvc-14.3-32.exe",
+            "hash": "sha1:346116632615e6083fda03e07b43053e507a6cb3"
         }
     },
     "innosetup": true,