diff --git a/pkgs/servers/asterisk/default.nix b/pkgs/servers/asterisk/default.nix
index b0e7d6aec56c..4c2bd80f42ed 100644
--- a/pkgs/servers/asterisk/default.nix
+++ b/pkgs/servers/asterisk/default.nix
@@ -91,17 +91,18 @@ let
   };
 
 in rec {
-  # Supported releases (as of 2020-10-07).
+  # Supported releases (as of 2020-10-26).
   # Source: https://wiki.asterisk.org/wiki/display/AST/Asterisk+Versions
   # Exact version can be found at https://www.asterisk.org/downloads/asterisk/all-asterisk-versions/
   #
   # Series  Type       Rel. Date   Sec. Fixes  EOL
   # 13.x    LTS        2014-10-24  2020-10-24  2021-10-24
   # 16.x    LTS        2018-10-09  2022-10-09  2023-10-09
-  asterisk-lts = asterisk_16;
+  # 18.x    LTS        2020-10-20  2024-10-20  2025-10-20
+  asterisk-lts = asterisk_18;
   # 17.x    Standard   2019-10-28  2020-10-28  2021-10-28
-  asterisk-stable = asterisk_17;
-  asterisk = asterisk_17;
+  asterisk-stable = asterisk_18;
+  asterisk = asterisk_18;
 
   asterisk_13 = common {
     version = "13.36.0";
@@ -129,4 +130,13 @@ in rec {
       "addons/mp3" = mp3-202;
     };
   };
+
+  asterisk_18 = common {
+    version = "18.0.0";
+    sha256 = "174zasx8d7ragy2fz4vwc4pbra9wl471mnisz1z0a3b2qsbh4y4v";
+    externals = {
+      "externals_cache/pjproject-2.10.tar.bz2" = pjproject_2_10;
+      "addons/mp3" = mp3-202;
+    };
+  };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 5f1cb87dcc5c..37c00d7dca15 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16409,7 +16409,7 @@ in
 
   inherit (callPackages ../servers/asterisk { })
     asterisk asterisk-stable asterisk-lts
-    asterisk_13 asterisk_16 asterisk_17;
+    asterisk_13 asterisk_16 asterisk_17 asterisk_18;
 
   asterisk-module-sccp = callPackage ../servers/asterisk/sccp { };