diff --git a/debian/copyright b/debian/copyright
index a0f1a56..6368af1 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -70,7 +70,6 @@
  src/filter/cairoimagegrid/*
  src/filter/colortap/*
  src/filter/rgbnoise/*
- src/filter/sigmoidaltransfer/*
  src/filter/softglow/*
  src/filter/spillsupress/*
  src/mixer2/cairoaffineblend/*
@@ -195,7 +194,6 @@
   2011, Dan Dennedy <dan@dennedy.org>
 License: LGPL-2.1+
 
-
 Files: src/filter/gamma/*
 Copyright: 2004, Jean-Sebastien Senecal
 License: GPL-2+
@@ -236,6 +234,11 @@
 Files: include/frei0r/blur.h
  src/filter/squareblur/*
 Copyright: 2004-2005, Mathieu Guindon
+License: GPL-2+
+
+Files: src/filter/sigmoidaltransfer/*
+Copyright: 2012, Janne Liljeblad
+ 2025, Cynthia
 License: GPL-2+
 
 Files: src/filter/vectorscope/*
@@ -274,6 +277,10 @@
 Files: src/filter/kaleid0sc0pe/*
 Copyright: 2020-2023, Brendan Hack (github@bendys.com)
 License: GPL-3
+
+Files: src/filter/heatmap0r/*
+Copyright: 2025, Cynthia (cynthia2048@proton.me)
+License: GPL-2+
 
 Files: src/filter/kaleid0sc0pe/sse_mathfun.h
 Copyright: 2007, Julien Pommier