diff --git a/pkgs/applications/science/chemistry/openmolcas/default.nix b/pkgs/applications/science/chemistry/openmolcas/default.nix
index af646b514af9..8efe537dcacd 100644
--- a/pkgs/applications/science/chemistry/openmolcas/default.nix
+++ b/pkgs/applications/science/chemistry/openmolcas/default.nix
@@ -5,9 +5,9 @@
 } :
 
 let
-  version = "21.02";
+  version = "21.06";
   # The tag keeps moving, fix a hash instead
-  gitLabRev = "41cee871945ac712e86ee971425a49a8fc60a936";
+  gitLabRev = "dd982ad4bc94dec8ac1e3e99cb6a7dd249ff71de";
 
   python = python3.withPackages (ps : with ps; [ six pyparsing ]);
 
@@ -19,7 +19,7 @@ in stdenv.mkDerivation {
     owner = "Molcas";
     repo = "OpenMolcas";
     rev = gitLabRev;
-    sha256 = "0cap53gy1wds2qaxbijw09fqhvfxphfkr93nhp9xdq84yxh4wzv6";
+    sha256 = "07dm73n0s7ckif561yb3s9yqxsv39a73kb9qwny4yp39wdvv52hz";
   };
 
   patches = [