diff --git a/pkgs/tools/security/afl/default.nix b/pkgs/tools/security/afl/default.nix
index 5bf9754775aa..dd2bcd7b61e4 100644
--- a/pkgs/tools/security/afl/default.nix
+++ b/pkgs/tools/security/afl/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name    = "afl-${version}";
-  version = "1.49b";
+  version = "1.56b";
 
   src = fetchurl {
     url    = "http://lcamtuf.coredump.cx/afl/releases/${name}.tgz";
-    sha256 = "14mbfdg78p80517zirvcsc2l2fbxn7n3j9zyfq8cn9dr2qi9icpq";
+    sha256 = "1nagd9ycj0i1h7kx2pz07fpwy4b528inmc9hj7226qiid0bynsh4";
   };
 
   buildPhase   = "make PREFIX=$out";