diff --git a/pkgs/applications/science/math/sage/sage-src.nix b/pkgs/applications/science/math/sage/sage-src.nix
index 4a912e002d97..1678567b77fb 100644
--- a/pkgs/applications/science/math/sage/sage-src.nix
+++ b/pkgs/applications/science/math/sage/sage-src.nix
@@ -125,6 +125,14 @@ stdenv.mkDerivation rec {
       sha256 = "sha256-3eJPfWfCrCAQ5filIn7FbzjRQeO9QyTIVl/HyRuqFtE=";
     })
 
+    # https://trac.sagemath.org/ticket/32567
+    (fetchSageDiff {
+      base = "9.5.beta2";
+      name = "arb-2.21.0-update.patch";
+      rev = "eb3304dd521a3d5a9334e747a08e234bbf16b4eb";
+      sha256 = "sha256-XDkaY4VQGyESXI6zuD7nCNzyQOl/fmBFvAESH9+RRvk=";
+    })
+
     # https://trac.sagemath.org/ticket/32797
     (fetchSageDiff {
       base = "9.5.beta7";
diff --git a/pkgs/development/libraries/arb/default.nix b/pkgs/development/libraries/arb/default.nix
index 393639ea558b..e47dcd8e0ba2 100644
--- a/pkgs/development/libraries/arb/default.nix
+++ b/pkgs/development/libraries/arb/default.nix
@@ -9,13 +9,13 @@
 
 stdenv.mkDerivation rec {
   pname = "arb";
-  version = "2.20.0";
+  version = "2.21.1";
 
   src = fetchFromGitHub {
     owner = "fredrik-johansson";
     repo = pname;
     rev = version;
-    sha256 = "sha256-HOIbdkVV7NKowIGhDdn/S8unIRV469OnRHiuiCGaWgk=";
+    sha256 = "sha256-OBY2gKVnvrZLVrv+d6rXQLo026mrGB9eyNV4LESgrNI=";
   };
 
   buildInputs = [ mpir gmp mpfr flint ];