diff --git a/pkgs/development/libraries/audio/libbass/default.nix b/pkgs/development/libraries/audio/libbass/default.nix
index 58f59efefcda..48a1c8bffb62 100644
--- a/pkgs/development/libraries/audio/libbass/default.nix
+++ b/pkgs/development/libraries/audio/libbass/default.nix
@@ -15,28 +15,28 @@
 let
   allBass = {
     bass = {
-      h = "bass.h";
-      version = "2.4.17";
+      h = "c/bass.h";
+      version = "2.4.18.3";
       so = {
         i686_linux = "libs/x86/libbass.so";
         x86_64-linux = "libs/x86_64/libbass.so";
         armv7l-linux = "libs/armhf/libbass.so";
         aarch64-linux = "libs/aarch64/libbass.so";
       };
-      url = "https://web.archive.org/web/20240501180538/http://www.un4seen.com/files/bass24-linux.zip";
-      hash = "sha256-/JAlvtZtnzuzZjWy3n1WT8Q5ZVLO0BJJAJT7/dELS3o=";
+      url = "https://web.archive.org/web/20251222154947/https://www.un4seen.com/files/bass24-linux.zip";
+      hash = "sha256-3iZk+9MaGn7vTbSNprjChICMXhk8Pu4hWHIR3peGkXI=";
     };
 
     bass_fx = {
       h = "C/bass_fx.h";
-      version = "2.4.12.1";
+      version = "2.4.12.6";
       so = {
         i686_linux = "libs/x86/libbass_fx.so";
         x86_64-linux = "libs/x86_64/libbass_fx.so";
         armv7l-linux = "libs/armhf/libbass_fx.so";
         aarch64-linux = "libs/aarch64/libbass_fx.so";
       };
-      url = "https://web.archive.org/web/20240926184106/https://www.un4seen.com/files/z/0/bass_fx24-linux.zip";
+      url = "https://web.archive.org/web/20250627192213/https://www.un4seen.com/files/z/0/bass_fx24-linux.zip";
       hash = "sha256-Hul2ELwnaDV8TDRMDXoFisle31GATDkf3PdkR2K9QTs=";
     };