diff --git a/pkgs/development/libraries/libmicrohttpd/default.nix b/pkgs/development/libraries/libmicrohttpd/default.nix
index 719053e7ecf..f8f4439a3df 100644
--- a/pkgs/development/libraries/libmicrohttpd/default.nix
+++ b/pkgs/development/libraries/libmicrohttpd/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "libmicrohttpd";
-  version = "0.9.64";
+  version = "0.9.66";
 
   src = fetchurl {
     url = "mirror://gnu/libmicrohttpd/${pname}-${version}.tar.gz";
-    sha256 = "03imzkd1hl2mkkpi84vg5xq9x6b58gwsv86ym85km0lhb7nxi4p7";
+    sha256 = "06xblz77bnn29y7sl43avxbcrjbw486x3416plpr3x3l2pdx8rjf";
   };
 
   outputs = [ "out" "dev" "devdoc" "info" ];