diff --git a/pkgs/development/tools/eclipse-mat/default.nix b/pkgs/development/tools/eclipse-mat/default.nix
index 608c721caf00..01146542d0cc 100644
--- a/pkgs/development/tools/eclipse-mat/default.nix
+++ b/pkgs/development/tools/eclipse-mat/default.nix
@@ -20,7 +20,7 @@
 
 with lib;
 let
-  pVersion = "1.11.0.20201202";
+  pVersion = "1.12.0.20210602";
   pVersionTriple = splitVersion pVersion;
   majorVersion = elemAt pVersionTriple 0;
   minorVersion = elemAt pVersionTriple 1;
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "http://ftp.halifax.rwth-aachen.de/eclipse//mat/${baseVersion}/rcp/MemoryAnalyzer-${version}-linux.gtk.x86_64.zip";
-    sha256 = "sha256-HtIKcGfdjb2wovGGSxv16ud7y1cPQFBn77pkhiekAkI=";
+    sha256 = "sha256-qX4RPuZdeiEduJAEpzOi/QnbJ+kaD0PZ3WHrmGsvqHc=";
   };
 
   desktopItem = makeDesktopItem {