diff --git a/pkgs/development/libraries/libcyaml/default.nix b/pkgs/development/libraries/libcyaml/default.nix
index dede81b0a1c..645187368e1 100644
--- a/pkgs/development/libraries/libcyaml/default.nix
+++ b/pkgs/development/libraries/libcyaml/default.nix
@@ -4,13 +4,13 @@
 
 stdenv.mkDerivation rec {
   pname = "libcyaml";
-  version = "1.3.1";
+  version = "1.4.0";
 
   src = fetchFromGitHub {
     owner = "tlsa";
     repo = "libcyaml";
     rev = "v${version}";
-    sha256 = "sha256-ntgTgIJ3u1IbR/eYOgwmgR9Jvx28P+l44wAMlBEcbj8=";
+    sha256 = "sha256-UENh8oxZm7uukCr448Nrf7devDK4SIT3DVhvXbwfjw8=";
   };
 
   buildInputs = [ libyaml ];