diff --git a/pkgs/servers/monitoring/prometheus/postfix-exporter.nix b/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
index 8bbfcc9e8fe3..e593a93389ad 100644
--- a/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
@@ -10,16 +10,16 @@
 
 buildGoModule rec {
   pname = "postfix_exporter";
-  version = "0.8.0";
+  version = "0.9.0";
 
   src = fetchFromGitHub {
     owner = "Hsn723";
     repo = "postfix_exporter";
     tag = "v${version}";
-    sha256 = "sha256-g/Y+amX3vyyhkxvJAxPimFDgFdpcA5+zWTu2Mhq3Dyw=";
+    sha256 = "sha256-ypwrruekFJXiCNrh2mcEr2mZvaKQrwRpIERE7/L4LHU=";
   };
 
-  vendorHash = "sha256-hcS7BBs54RmBu1d2EXedc9bU2eXmB9bQ4yAyYgp85xY=";
+  vendorHash = "sha256-xtts/HXPaaEWtmqTAZdXOrN4nDR5qMIJzwcxqXAoynU=";
 
   ldflags = [
     "-s"