diff --git a/pkgs/development/tools/analysis/spin/default.nix b/pkgs/development/tools/analysis/spin/default.nix
index a59b452b432b..82efb7a1a8a0 100644
--- a/pkgs/development/tools/analysis/spin/default.nix
+++ b/pkgs/development/tools/analysis/spin/default.nix
@@ -7,15 +7,12 @@ let
 
 in stdenv.mkDerivation rec {
   name = "spin-${version}";
-  version = "6.4.8";
+  version = "6.4.9";
   url-version = stdenv.lib.replaceChars ["."] [""] version;
 
   src = fetchurl {
-    # The homepage is behind CloudFlare anti-DDoS protection, which blocks cURL.
-    # Dropbox mirror from developers:
-    # https://www.dropbox.com/sh/fgzipzp4wpo3qc1/AADZPqS4aoR-pjNF6OQXRLQHa
-    url = "https://www.dropbox.com/sh/fgzipzp4wpo3qc1/AADya1lOBJZDbgWGrUSq-dfHa/spin${url-version}.tar.gz?raw=1";
-    sha256 = "1rvamdsf0igzpndlr4ck7004jw9x1bg4xyf78zh5k9sp848vnd80";
+    url = "http://spinroot.com/spin/Src/spin${url-version}.tar.gz";
+    sha256 = "07b7wk3qyfnp4pgwicqd33l7i1krzyihx0cf9zkv81ywaklf5vll";
   };
 
   nativeBuildInputs = [ makeWrapper ];