diff --git a/pkgs/development/libraries/beecrypt/default.nix b/pkgs/development/libraries/beecrypt/default.nix
index 430e45ceec18..d90dae2dee0a 100644
--- a/pkgs/development/libraries/beecrypt/default.nix
+++ b/pkgs/development/libraries/beecrypt/default.nix
@@ -1,10 +1,10 @@
 {stdenv, fetchurl, m4}:
 
 stdenv.mkDerivation {
-  name = "beecrypt-4.1.2";
+  name = "beecrypt-4.2.1";
   src = fetchurl {
-    url = mirror://sourceforge/beecrypt/beecrypt-4.1.2.tar.gz;
-    md5 = "820d26437843ab0a6a8a5151a73a657c";
+    url = mirror://sourceforge/beecrypt/beecrypt-4.2.1.tar.gz;
+    sha256 = "0pf5k1c4nsj77jfq5ip0ra1gzx2q47xaa0s008fnn6hd11b1yvr8";
   };
   buildInputs = [m4];
   configureFlags = "--disable-optimized --enable-static";