diff --git a/nix/docker/heptapod/default.nix b/nix/docker/heptapod/default.nix
index bc26f0ade4..5a381dcbac 100644
--- a/nix/docker/heptapod/default.nix
+++ b/nix/docker/heptapod/default.nix
@@ -6,10 +6,10 @@
 let
   origImageArgs = {
     imageName = "octobus/heptapod";
-    imageDigest = "sha256:0263dc6f045100828c27a447cc400b57fbfa489e5108628a6359a697933fd258";
-    sha256 = "sha256:0vxlifc8572b11n7zk0izhmpyz2jqbgn8vyp38jlas3slvajjrkb";
+    imageDigest = "sha256:3d7f8c57dff9c147ac23830e5e7ce5f8a70341f1a4abc24aab75eac4fe8d3241";
+    sha256 = "sha256:1v103b6v0gn12zzcafam7rhmp3fdacn7m6f4j7q9xph3cd0x3rrd";
     finalImageName = "octobus/heptapod";
-    finalImageTag = "0.20.7";
+    finalImageTag = "0.21.3";
   };
   origImage = pkgs.dockerTools.pullImage origImageArgs;