diff --git a/pkgs/development/tools/analysis/spin/default.nix b/pkgs/development/tools/analysis/spin/default.nix
index 48ba6379a0c1..9d361aced326 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 = "6.4.6";
+  version = "6.4.7";
   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/AAA-vBeJ7xty-CDZgk7OB58Ta/spin646.tar.gz?raw=1";
-    sha256 = "1n33qzlb7g30vhr5yxssw210b2m0242y9j21c7fqpn9z6b0rbhjp";
+    url = "http://spinroot.com/spin/Src/spin${url-version}.tar.gz";
+    sha256 = "17m2xaag0jns8hsa4466zxq35ylg9fnzynzvjjmx4ympbiil6mqv";
   };
 
   nativeBuildInputs = [ makeWrapper ];