diff --git a/pkgs/applications/radio/flmsg/default.nix b/pkgs/applications/radio/flmsg/default.nix
index cb0925019f9c..588185d9fbb7 100644
--- a/pkgs/applications/radio/flmsg/default.nix
+++ b/pkgs/applications/radio/flmsg/default.nix
@@ -7,12 +7,12 @@
 }:
 
 stdenv.mkDerivation rec {
-  version = "4.0.19";
+  version = "4.0.20";
   pname = "flmsg";
 
   src = fetchurl {
     url = "mirror://sourceforge/fldigi/${pname}-${version}.tar.gz";
-    sha256 = "sha256-Pm5qAUNbenkX9V3OSQWW09iIRR/WB1jB4ioyRCZmjqs=";
+    sha256 = "sha256-TsYwd2uUGJsweiKigTWBPXA7PtItZeIOxKk3lV3sy24=";
   };
 
   buildInputs = [