diff --git a/pkgs/development/libraries/capnproto/default.nix b/pkgs/development/libraries/capnproto/default.nix
index fda33fa1646..f21c3955836 100644
--- a/pkgs/development/libraries/capnproto/default.nix
+++ b/pkgs/development/libraries/capnproto/default.nix
@@ -8,14 +8,14 @@
 
 stdenv.mkDerivation rec {
   pname = "capnproto";
-  version = "0.10.3";
+  version = "0.10.4";
 
   # release tarballs are missing some ekam rules
   src = fetchFromGitHub {
     owner = "capnproto";
     repo = "capnproto";
     rev = "v${version}";
-    sha256 = "sha256-QrBSIKDwVlG8AIE/F4tnRq14xdhT05NKsBMldWzQQFo=";
+    sha256 = "sha256-45sxnVyyYIw9i3sbFZ1naBMoUzkpP21WarzR5crg4X8=";
   };
 
   nativeBuildInputs = [ cmake ];