diff --git a/pkgs/development/libraries/folly/default.nix b/pkgs/development/libraries/folly/default.nix
index c9ccff7dea6..dcb0fc07047 100644
--- a/pkgs/development/libraries/folly/default.nix
+++ b/pkgs/development/libraries/folly/default.nix
@@ -19,13 +19,13 @@
 
 stdenv.mkDerivation (rec {
   pname = "folly";
-  version = "2021.09.13.00";
+  version = "2021.09.20.00";
 
   src = fetchFromGitHub {
     owner = "facebook";
     repo = "folly";
     rev = "v${version}";
-    sha256 = "sha256-UZfCGvhi6cWUUa56GIYMOgFHn3Ifu9uIHs983SbZCcY=";
+    sha256 = "sha256-aFTFUtRQOGCDR3pbpw1ViuMFm02GSq04u9GgE9pq33A=";
   };
 
   nativeBuildInputs = [