diff --git a/CHANGES.md b/CHANGES.md
index da4a1350d0..1a5ff136c8 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,12 @@
+# Synapse 1.149.1 (2026-03-11)
+
+## Internal Changes
+
+- Bump `matrix-synapse-ldap3` to `0.4.0` to support `setuptools>=82.0.0`. Fixes [\#19541](https://github.com/element-hq/synapse/issues/19541). ([\#19543](https://github.com/element-hq/synapse/issues/19543))
+
+
+
+
 # Synapse 1.149.0 (2026-03-10)
 
 No significant changes since 1.149.0rc1.
diff --git a/debian/changelog b/debian/changelog
index af84dd2087..9cd39ee76c 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,9 +1,15 @@
-matrix-synapse-py3 (1.149.0+nmu1) UNRELEASED; urgency=medium
+matrix-synapse-py3 (1.149.1+nmu1) UNRELEASED; urgency=medium
 
   * Change how the systemd journald integration is installed.
 
  -- Quentin Gliech <packages@matrix.org>  Fri, 20 Feb 2026 19:19:51 +0100
 
+matrix-synapse-py3 (1.149.1) stable; urgency=medium
+
+  * New synapse release 1.149.1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 11 Mar 2026 09:30:24 +0000
+
 matrix-synapse-py3 (1.149.0) stable; urgency=medium
 
   * New synapse release 1.149.0.
diff --git a/poetry.lock b/poetry.lock
index 0df6addb3a..0d03c860f5 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1548,24 +1548,25 @@ test = ["aiounittest", "tox", "twisted"]
 
 [[package]]
 name = "matrix-synapse-ldap3"
-version = "0.3.0"
+version = "0.4.0"
 description = "An LDAP3 auth provider for Synapse"
 optional = true
-python-versions = ">=3.7"
+python-versions = ">=3.10"
 groups = ["main"]
 markers = "extra == \"matrix-synapse-ldap3\" or extra == \"all\""
 files = [
-    {file = "matrix-synapse-ldap3-0.3.0.tar.gz", hash = "sha256:8bb6517173164d4b9cc44f49de411d8cebdb2e705d5dd1ea1f38733c4a009e1d"},
-    {file = "matrix_synapse_ldap3-0.3.0-py3-none-any.whl", hash = "sha256:8b4d701f8702551e98cc1d8c20dbed532de5613584c08d0df22de376ba99159d"},
+    {file = "matrix_synapse_ldap3-0.4.0-py3-none-any.whl", hash = "sha256:bf080037230d2af5fd3639cb87266de65c1cad7a68ea206278c5b4bf9c1a17f3"},
+    {file = "matrix_synapse_ldap3-0.4.0.tar.gz", hash = "sha256:cff52ba780170de5e6e8af42863d2648ee23f3bf0a9fea6db52372f9fc00be2b"},
 ]
 
 [package.dependencies]
 ldap3 = ">=2.8"
-service-identity = "*"
+packaging = ">=14.1"
+service_identity = "*"
 Twisted = ">=15.1.0"
 
 [package.extras]
-dev = ["black (==22.3.0)", "flake8 (==4.0.1)", "isort (==5.9.3)", "ldaptor", "matrix-synapse", "mypy (==0.910)", "tox", "types-setuptools"]
+dev = ["black (==24.2.0)", "flake8 (==7.0.0)", "isort (==5.9.3)", "ldaptor", "matrix-synapse", "mypy (==1.9.0)", "tox", "types-setuptools"]
 
 [[package]]
 name = "mdurl"
diff --git a/pyproject.toml b/pyproject.toml
index eacf7dbda2..07ab1ee5db 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "matrix-synapse"
-version = "1.149.0"
+version = "1.149.1"
 description = "Homeserver for the Matrix decentralised comms protocol"
 readme = "README.rst"
 authors = [