diff --git a/pkgs/servers/sql/postgresql/ext/postgis.nix b/pkgs/servers/sql/postgresql/ext/postgis.nix
index 65541730d296..1a5058375d5a 100644
--- a/pkgs/servers/sql/postgresql/ext/postgis.nix
+++ b/pkgs/servers/sql/postgresql/ext/postgis.nix
@@ -20,13 +20,13 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "postgis";
-  version = "3.4.1";
+  version = "3.4.2";
 
   outputs = [ "out" "doc" ];
 
   src = fetchurl {
     url = "https://download.osgeo.org/postgis/source/postgis-${version}.tar.gz";
-    sha256 = "sha256-/vahQSE9D/J79FszuEnMOWwi3bH/xv7UNUacnokfyB0=";
+    sha256 = "sha256-yMh0wAukqYSocDCva/lUSCFQIGCtRz1clvHU0INcWJI=";
   };
 
   buildInputs = [ libxml2 postgresql geos proj gdal json_c protobufc pcre2.dev ]