diff --git a/bucket/concourse-fly.json b/bucket/concourse-fly.json
index 0d4bda71f2..50a172d3eb 100644
--- a/bucket/concourse-fly.json
+++ b/bucket/concourse-fly.json
@@ -1,12 +1,12 @@
 {
-    "version": "6.0.0",
+    "version": "5.5.11",
     "description": "Concourse CI/CD manager and controller",
     "homepage": "https://concourse-ci.org/fly.html",
     "license": "Apache-2.0",
     "architecture": {
         "64bit": {
-            "url": "https://github.com/concourse/concourse/releases/download/v6.0.0/fly-6.0.0-windows-amd64.zip",
-            "hash": "sha1:12af46d712bebdcc830c8e4f887b25eef69154cb"
+            "url": "https://github.com/concourse/concourse/releases/download/v5.5.11/fly-5.5.11-windows-amd64.zip",
+            "hash": "sha1:0e5e405b6824698fbb70b8f1d4e53981bd0d635c"
         }
     },
     "bin": "fly.exe",