diff --git a/manifest.dhall b/manifest.dhall
index 9b217fa5ae15a2639e0947097945e653e30b34f7..a469aec60ac46a3e5b0d0ca1a64356b85579dfec 100644
--- a/manifest.dhall
+++ b/manifest.dhall
@@ -76,6 +76,7 @@ in  [ callHackage "Cabal" "3.8.1.0"
     , callHackage "ansi-terminal" "0.11.3"
     , callHackage "ansi-wl-pprint" "0.6.9"
     , callHackage "apecs" "0.9.4"
+    , callHackage "asn1-types" "0.3.4"
     , callHackage "assoc" "1.0.2"
     , callHackage "async" "2.2.4"
     , callHackage "autodocodec" "0.2.0.1"
diff --git a/overlay.nix b/overlay.nix
index af866b3754c55b0fea2d46052d7f6d64c8ef7135..ac4d6ec6dbe2d543d8bcc7d5db28e124e63fbef9 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -35,6 +35,8 @@ final: prev: with pkgs.haskell.lib; {
 
   apecs = prev.callPackage (./pkgs/apecs.nix) { };
 
+  asn1-types = prev.callPackage (./pkgs/asn1-types.nix) { };
+
   assoc = prev.callPackage (./pkgs/assoc.nix) { };
 
   async = prev.callPackage (./pkgs/async.nix) { };
diff --git a/pkgs/asn1-types.nix b/pkgs/asn1-types.nix
new file mode 100644
index 0000000000000000000000000000000000000000..83a5288893e6b48022be0401ee1a456a928b3dd5
--- /dev/null
+++ b/pkgs/asn1-types.nix
@@ -0,0 +1,21 @@
+{ mkDerivation, base, bytestring, hourglass, lib, memory }:
+mkDerivation {
+  pname = "asn1-types";
+  version = "0.3.4";
+  sha256 = "78ee92a251379298ca820fa53edbf4b33c539b9fcd887c86f520c30e3b4e21a8";
+  isLibrary = true;
+  isExecutable = false;
+  enableSeparateDataOutput = false;
+  libraryHaskellDepends = [ base bytestring hourglass memory ];
+  enableLibraryProfiling = false;
+  enableExecutableProfiling = false;
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  doBenchmark = false;
+  hyperlinkSource = false;
+  homepage = "http://github.com/vincenthz/hs-asn1";
+  description = "ASN.1 types";
+  license = lib.licenses.bsd3;
+  broken = false;
+}