diff --git a/manifest.dhall b/manifest.dhall
index af28419a8a800f857acfcdd155e4f2be4d780828..3386b0541435de1b940b67463d345c7bbff0290d 100644
--- a/manifest.dhall
+++ b/manifest.dhall
@@ -622,6 +622,7 @@ in  [ callHackage "Cabal" "3.8.1.0"
         "https://github.com/haskell-effectful/time-effectful"
         (Some "e212239b685e1ecf7ee95dd1e944cc563351907f")
         (None Text)
+    , callHackage "tls-session-manager" "0.0.4"
     , callHackage "tls" "1.6.0"
     , callHackage "tree-diff" "0.2.2"
     , callHackage "trifecta" "2.1.2"
diff --git a/overlay.nix b/overlay.nix
index c0e92ba6f3eeb843213439d3e2865ea60bad475f..cada8dfc921b5b580866a48f8abc09b66f940bd2 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -869,6 +869,8 @@ final: prev: with pkgs.haskell.lib; {
 
   tls = prev.callPackage (./pkgs/tls.nix) { };
 
+  tls-session-manager = prev.callPackage (./pkgs/tls-session-manager.nix) { };
+
   tree-diff = prev.callPackage (./pkgs/tree-diff.nix) { };
 
   trifecta = prev.callPackage (./pkgs/trifecta.nix) { };
diff --git a/pkgs/tls-session-manager.nix b/pkgs/tls-session-manager.nix
new file mode 100644
index 0000000000000000000000000000000000000000..197b0c950346992c3b60b1e77580f9bf1389fb64
--- /dev/null
+++ b/pkgs/tls-session-manager.nix
@@ -0,0 +1,39 @@
+{ mkDerivation
+, auto-update
+, base
+, basement
+, bytestring
+, clock
+, lib
+, memory
+, psqueues
+, tls
+}:
+mkDerivation {
+  pname = "tls-session-manager";
+  version = "0.0.4";
+  sha256 = "ba207f79b4536a65625063106c621e8bafc0dc7928bd9273270e19f36d59938c";
+  isLibrary = true;
+  isExecutable = false;
+  enableSeparateDataOutput = false;
+  libraryHaskellDepends = [
+    auto-update
+    base
+    basement
+    bytestring
+    clock
+    memory
+    psqueues
+    tls
+  ];
+  enableLibraryProfiling = false;
+  enableExecutableProfiling = false;
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  doBenchmark = false;
+  hyperlinkSource = false;
+  description = "In-memory TLS session manager";
+  license = lib.licenses.bsd3;
+  broken = false;
+}