diff --git a/pkgs/servers/sql/postgresql/ext/pgroonga.nix b/pkgs/servers/sql/postgresql/ext/pgroonga.nix
index d82800e576aa..1c5831aaac3e 100644
--- a/pkgs/servers/sql/postgresql/ext/pgroonga.nix
+++ b/pkgs/servers/sql/postgresql/ext/pgroonga.nix
@@ -11,13 +11,13 @@
 
 postgresqlBuildExtension (finalAttrs: {
   pname = "pgroonga";
-  version = "4.0.4";
+  version = "4.0.5";
 
   src = fetchFromGitHub {
     owner = "pgroonga";
     repo = "pgroonga";
     tag = "${finalAttrs.version}";
-    hash = "sha256-SXQH+L7FKhu+2+9QyQTNi+3nFYtkE7WXv2A5LdvjG2w=";
+    hash = "sha256-PwUnjwqnmoWQ9kKZuKsAVzVBRyKvT+aexrm5eeRiRIQ=";
   };
 
   nativeBuildInputs = [ pkg-config ];