diff --git a/pkgs/development/tools/misc/hydra/default.nix b/pkgs/development/tools/misc/hydra/default.nix
index 40a480a0909..7bed3b5d202 100644
--- a/pkgs/development/tools/misc/hydra/default.nix
+++ b/pkgs/development/tools/misc/hydra/default.nix
@@ -2,12 +2,12 @@
 
 {
   hydra-unstable = callPackage ./common.nix {
-    version = "2021-03-29";
+    version = "2021-04-29";
     src = fetchFromGitHub {
       owner = "NixOS";
       repo = "hydra";
-      rev = "9bb04ed97af047968196bad1728f927f7a6d905f";
-      sha256 = "sha256-gN/zNI2hGDMnYUjeGnU7SAuXP4KCmNqG+AYOVfINaQE=";
+      rev = "6047b1dd04d44acff9343b6b971ab609b73099d5";
+      sha256 = "sha256-E7JOHhSd4gIzE6FvSZVMxZE9WagbBkrfZVoibkanaYE=";
     };
     nix = nixFlakes;