diff --git a/pkgs/development/libraries/libtasn1/default.nix b/pkgs/development/libraries/libtasn1/default.nix
index 1e45f07a22f..5ecbcc63a95 100644
--- a/pkgs/development/libraries/libtasn1/default.nix
+++ b/pkgs/development/libraries/libtasn1/default.nix
@@ -1,11 +1,11 @@
 { stdenv, fetchurl, perl, texinfo }:
 
 stdenv.mkDerivation rec {
-  name = "libtasn1-4.8";
+  name = "libtasn1-4.9";
 
   src = fetchurl {
     url = "mirror://gnu/libtasn1/${name}.tar.gz";
-    sha256 = "04y5m29pqmvkfdbppmsdifyx89v8xclxzklpfc7a1fkr9p4jz07s";
+    sha256 = "0869cp6jx7cajgv6cnddsh3vc7bimmdkdjn80y1jpb4iss7plvsg";
   };
 
   outputs = [ "out" "dev" "devdoc" ];