diff --git a/pkgs/development/libraries/afflib/default.nix b/pkgs/development/libraries/afflib/default.nix
index cb0c8025ddfa..e82c3c8dfe77 100644
--- a/pkgs/development/libraries/afflib/default.nix
+++ b/pkgs/development/libraries/afflib/default.nix
@@ -3,14 +3,14 @@
 }:
 
 stdenv.mkDerivation rec {
-  version = "3.7.19";
+  version = "3.7.20";
   pname = "afflib";
 
   src = fetchFromGitHub {
     owner = "sshock";
     repo = "AFFLIBv3";
     rev = "v${version}";
-    sha256 = "1qs843yi33yqbp0scqirn753lxzg762rz6xy2h3f8f77fijqj2qb";
+    sha256 = "sha256-xkqBfTftzn+rgeuoaKfHP7vQmy4VZuaCq8VFlfZTUE4=";
   };
 
   nativeBuildInputs = [ autoreconfHook ];