diff --git a/pkgs/development/libraries/nspr/default.nix b/pkgs/development/libraries/nspr/default.nix
index 31a9f7f20d1a..9ab89aaefbfe 100644
--- a/pkgs/development/libraries/nspr/default.nix
+++ b/pkgs/development/libraries/nspr/default.nix
@@ -2,7 +2,7 @@
 , CoreServices ? null
 , buildPackages }:
 
-let version = "4.25"; in
+let version = "4.26"; in
 
 stdenv.mkDerivation {
   pname = "nspr";
@@ -10,7 +10,7 @@ stdenv.mkDerivation {
 
   src = fetchurl {
     url = "mirror://mozilla/nspr/releases/v${version}/src/nspr-${version}.tar.gz";
-    sha256 = "0mjjk2b7ika3v4y99cnaqz3z1iq1a50r1psn9i3s87gr46z0khqb";
+    sha256 = "0gbp3g9p4nhf0zrlvqi5883sqb9zdw0wk83lccpgskxphlni97gw";
   };
 
   patches = [