diff --git a/pkgs/by-name/or/orthanc/package.nix b/pkgs/by-name/or/orthanc/package.nix
index fa710876d1a9..b56e60151150 100644
--- a/pkgs/by-name/or/orthanc/package.nix
+++ b/pkgs/by-name/or/orthanc/package.nix
@@ -28,12 +28,12 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "orthanc";
-  version = "1.12.8";
+  version = "1.12.9";
 
   src = fetchhg {
     url = "https://orthanc.uclouvain.be/hg/orthanc/";
     rev = "Orthanc-${finalAttrs.version}";
-    hash = "sha256-ktfTqCid/0aYAp5HPB7niZ1sw+zMNmd5mhZrXRbMGyk=";
+    hash = "sha256-IBULO03og+aXmpYAXZdsesTFkc7HkeXol+A7yzDzcfQ=";
   };
 
   outputs = [