diff --git a/pkgs/tools/admin/lego/default.nix b/pkgs/tools/admin/lego/default.nix
index 609c085edbd3..9d7c35a73bea 100644
--- a/pkgs/tools/admin/lego/default.nix
+++ b/pkgs/tools/admin/lego/default.nix
@@ -2,13 +2,13 @@
 
 buildGoModule rec {
   pname = "lego";
-  version = "4.9.0";
+  version = "4.9.1";
 
   src = fetchFromGitHub {
     owner = "go-acme";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-lMPyquQ+CeMe/V+hG4h61+GiuCXqjVAcTV9Fo3DNb6E=";
+    sha256 = "sha256-YaJT+gTnw9A2joL8D3P7fs/NTyHpH4gDhg6STv19SZU=";
   };
 
   vendorSha256 = "sha256-gHwyXzmws99tPRJKR/boc0Hf+b5h9ZkzH2aiN8u6Z0I=";