diff --git a/pkgs/development/libraries/aws-c-event-stream/default.nix b/pkgs/development/libraries/aws-c-event-stream/default.nix
index 8f469d93054a..eab60c9374cb 100644
--- a/pkgs/development/libraries/aws-c-event-stream/default.nix
+++ b/pkgs/development/libraries/aws-c-event-stream/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "aws-c-event-stream";
-  version = "0.4.2";
+  version = "0.4.3";
 
   src = fetchFromGitHub {
     owner = "awslabs";
     repo = pname;
     rev = "v${version}";
-    hash = "sha256-wj3PZshUay3HJy+v7cidDL4mDAqSDiX+MmQtJDK4rTI=";
+    hash = "sha256-xLgPFy+wFtUe3GawICrAHyji+mkfxC2jw7lsL+p7pl4=";
   };
 
   nativeBuildInputs = [ cmake ];