diff --git a/pkgs/servers/asterisk/default.nix b/pkgs/servers/asterisk/default.nix
index 15dbfc4cba99..4102f60c716f 100644
--- a/pkgs/servers/asterisk/default.nix
+++ b/pkgs/servers/asterisk/default.nix
@@ -36,25 +36,6 @@
 }:
 
 let
-  # remove when upgrading to pjsip >2.13
-  pjsip_2_13_patches = [
-    (fetchpatch {
-      name = "CVE-2022-23537.patch";
-      url = "https://github.com/pjsip/pjproject/commit/d8440f4d711a654b511f50f79c0445b26f9dd1e1.patch";
-      sha256 = "sha256-7ueQCHIiJ7MLaWtR4+GmBc/oKaP+jmEajVnEYqiwLRA=";
-    })
-    (fetchpatch {
-      name = "CVE-2022-23547.patch";
-      url = "https://github.com/pjsip/pjproject/commit/bc4812d31a67d5e2f973fbfaf950d6118226cf36.patch";
-      sha256 = "sha256-bpc8e8VAQpfyl5PX96G++6fzkFpw3Or1PJKNPKl7N5k=";
-    })
-    (fetchpatch {
-      name = "CVE-2023-27585.patch";
-      url = "https://github.com/pjsip/pjproject/commit/d1c5e4da5bae7f220bc30719888bb389c905c0c5.patch";
-      hash = "sha256-+yyKKTKG2FnfyLWnc4S80vYtDzmiu9yRmuqb5eIulPg=";
-    })
-  ];
-
   common = { version, sha256, externals, pjsip_patches ? [ ] }: stdenv.mkDerivation {
     inherit version;
     pname = "asterisk"
@@ -161,12 +142,12 @@ let
     };
   };
 
-  pjproject_2_13 = fetchurl
+  pjproject_2_13_1 = fetchurl
     {
-      url = "https://raw.githubusercontent.com/asterisk/third-party/master/pjproject/2.13/pjproject-2.13.tar.bz2";
-      hash = "sha256-Zj93PUAct13KVR5taOWEbQdKq76wicaBTNHpHC0rICY=";
+      url = "https://raw.githubusercontent.com/asterisk/third-party/master/pjproject/2.13.1/pjproject-2.13.1.tar.bz2";
+      hash = "sha256-cOBRvO+B9fGt4UVYAHQQwBsc2cUF7Pu1GRsjAF7BE1g=";
     } // {
-    pjsip_patches = pjsip_2_13_patches;
+    pjsip_patches = [ ];
   };
 
   mp3-202 = fetchsvn {
@@ -187,7 +168,7 @@ let
   versions = lib.mapAttrs
     (_: { version, sha256 }:
       let
-        pjsip = pjproject_2_13;
+        pjsip = pjproject_2_13_1;
       in
       common {
         inherit version sha256;
diff --git a/pkgs/servers/asterisk/versions.json b/pkgs/servers/asterisk/versions.json
index 1e6e4e4417ef..db902df9a412 100644
--- a/pkgs/servers/asterisk/versions.json
+++ b/pkgs/servers/asterisk/versions.json
@@ -1,18 +1,14 @@
 {
-  "asterisk_16": {
-    "sha256": "f8448e8784df7fac019e459bf7c82529d80afe64ae97d73d40e6aa0e4fb39724",
-    "version": "16.30.0"
-  },
   "asterisk_18": {
-    "sha256": "66f0e55d84f9e5bf4e79a56255d35a034448acce00d219c3bf4930b1ebb0e88e",
-    "version": "18.17.1"
-  },
-  "asterisk_19": {
-    "sha256": "f0c56d1f8e39e0427455edfe25d24ff088c756bdc32dd1278c9f7a320815cbaa",
-    "version": "19.8.0"
+    "sha256": "ad7d01f58e5c5266e5b23cc385e6a3d32a656b93c1d4b4fb0082f3300012bd02",
+    "version": "18.20.1"
   },
   "asterisk_20": {
-    "sha256": "df12e47000fbac42bb780bb06172aa8bb8ac26faf77cc9f95184695b0cec69c3",
-    "version": "20.2.1"
+    "sha256": "7d128f2a164e36fae4875058120ff026e7cd73f7701429fee4fa293f4fba4336",
+    "version": "20.5.1"
+  },
+  "asterisk_21": {
+    "sha256": "8e7db886b70e808ade38ad060ccbbb49353031e4c2fa6dc4435bfbd79f082956",
+    "version": "21.0.1"
   }
 }