diff --git a/pkgs/by-name/ho/houdini/runtime.nix b/pkgs/by-name/ho/houdini/runtime.nix
index ddc9f4a834f9..b462ccf5bb1b 100644
--- a/pkgs/by-name/ho/houdini/runtime.nix
+++ b/pkgs/by-name/ho/houdini/runtime.nix
@@ -1,12 +1,12 @@
 { requireFile, callPackage }:
 
 callPackage ./runtime-build.nix rec {
-  version = "20.5.445";
+  version = "20.5.684";
   eulaDate = "2021-10-13";
   src = requireFile {
     name = "houdini-${version}-linux_x86_64_gcc11.2.tar.gz";
-    hash = "sha256-rk8HKX1Aq7ACbAWKFxfjSzfa3PA/iXQZsYOkr/kSbkM=";
+    hash = "sha256-cyFeeKBCV1EGdgruQ71EnEJOVndn1SKSiCtD6WRc878=";
     url = "https://www.sidefx.com/download/daily-builds/?production=true";
   };
-  outputHash = "sha256-bdL+Ha5LWkty4r+rgPAKr50pxV+j7CLspD4KOsSxyMo=";
+  outputHash = "sha256-mAX4jSdV0/DC+48O7d1hgmKjC1leKm1QgSBMbyAxyFs=";
 }