diff --git a/pkgs/tools/networking/curl/default.nix b/pkgs/tools/networking/curl/default.nix
index 4ec79af6651..0627d6042c0 100644
--- a/pkgs/tools/networking/curl/default.nix
+++ b/pkgs/tools/networking/curl/default.nix
@@ -21,11 +21,11 @@ assert scpSupport -> libssh2 != null;
 assert c-aresSupport -> c-ares != null;
 
 stdenv.mkDerivation rec {
-  name = "curl-7.55.1";
+  name = "curl-7.56.0";
 
   src = fetchurl {
     url = "http://curl.haxx.se/download/${name}.tar.bz2";
-    sha256 = "1yvcn7jbh99gsqhc040nky0h15a1cfh8yic6k0a1zhdhscpakcg5";
+    sha256 = "1pvr2bqfhk46bzq2x2hskmnq3wc8qxlps7apm9q1qiixb9ra8q6y";
   };
 
   outputs = [ "bin" "dev" "out" "man" "devdoc" ];