diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 877d4a4..607a78f 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,9 +1,11 @@
-******************
-UPCOMING - [1.1.1]
-******************
+********************
+[1.1.1] - 2026-03-06
+********************
 
-- Drop Python 3.9 support, require Python >= 3.10 (:pr:`397`, :user:`benjeffery`)
+Maintenance release.
 
+- Improved performance on remove_vacant (:issue:`393`)
+- Require Python >= 3.11
 
 ********************
 [1.1.0] - 2025-08-16
diff --git a/pyproject.toml b/pyproject.toml
index 7d491d8..b255437 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools", "setuptools-scm"]
+requires = ["setuptools"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -55,7 +55,6 @@ test = [
     "filelock",
     "tskit",
     "msprime",
-    "matplotlib",
     "pandas",
 ]
 
@@ -64,7 +63,6 @@ docs = [
     "matplotlib",
     "msprime",
     "pandas",
-    "setuptools-scm",
     "sphinx-argparse",
     "sphinx-issues",
 ]
diff --git a/pyslim/_version.py b/pyslim/_version.py
index 3a0cf01..b3b36c4 100644
--- a/pyslim/_version.py
+++ b/pyslim/_version.py
@@ -1,4 +1,4 @@
-pyslim_version = "1.1.0"
+pyslim_version = "1.1.1"
 slim_file_version = "0.9"
 # other file versions that require no modification
 compatible_slim_file_versions = ["0.9"]
diff --git a/uv.lock b/uv.lock
index 52f6396..779db25 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1853,7 +1853,6 @@ dev = [
     { name = "pytest-cov" },
     { name = "pytest-xdist" },
     { name = "ruff" },
-    { name = "setuptools-scm" },
     { name = "sphinx-argparse" },
     { name = "sphinx-issues" },
     { name = "tskit" },
@@ -1865,7 +1864,6 @@ docs = [
     { name = "matplotlib" },
     { name = "msprime" },
     { name = "pandas" },
-    { name = "setuptools-scm" },
     { name = "sphinx-argparse" },
     { name = "sphinx-issues" },
 ]
@@ -1879,7 +1877,6 @@ packaging = [
 ]
 test = [
     { name = "filelock" },
-    { name = "matplotlib" },
     { name = "msprime" },
     { name = "pandas" },
     { name = "pytest" },
@@ -1907,7 +1904,6 @@ dev = [
     { name = "pytest-cov" },
     { name = "pytest-xdist" },
     { name = "ruff", specifier = "==0.15.1" },
-    { name = "setuptools-scm" },
     { name = "sphinx-argparse" },
     { name = "sphinx-issues" },
     { name = "tskit" },
@@ -1919,7 +1915,6 @@ docs = [
     { name = "matplotlib" },
     { name = "msprime" },
     { name = "pandas" },
-    { name = "setuptools-scm" },
     { name = "sphinx-argparse" },
     { name = "sphinx-issues" },
 ]
@@ -1933,7 +1928,6 @@ packaging = [
 ]
 test = [
     { name = "filelock" },
-    { name = "matplotlib" },
     { name = "msprime" },
     { name = "pandas" },
     { name = "pytest" },
@@ -2367,19 +2361,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/e1/c6/76dc613121b793286a3f91621d7b75a2b493e0390ddca50f11993eadf192/setuptools-82.0.0-py3-none-any.whl", hash = "sha256:70b18734b607bd1da571d097d236cfcfacaf01de45717d59e6e04b96877532e0", size = 1003468, upload-time = "2026-02-08T15:08:38.723Z" },
 ]
 
-[[package]]
-name = "setuptools-scm"
-version = "9.2.2"
-source = { registry = "https://pypi.org/simple" }
-dependencies = [
-    { name = "packaging" },
-    { name = "setuptools" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/7b/b1/19587742aad604f1988a8a362e660e8c3ac03adccdb71c96d86526e5eb62/setuptools_scm-9.2.2.tar.gz", hash = "sha256:1c674ab4665686a0887d7e24c03ab25f24201c213e82ea689d2f3e169ef7ef57", size = 203385, upload-time = "2025-10-19T22:08:05.608Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/3d/ea/ac2bf868899d0d2e82ef72d350d97a846110c709bacf2d968431576ca915/setuptools_scm-9.2.2-py3-none-any.whl", hash = "sha256:30e8f84d2ab1ba7cb0e653429b179395d0c33775d54807fc5f1dd6671801aef7", size = 62975, upload-time = "2025-10-19T22:08:04.007Z" },
-]
-
 [[package]]
 name = "six"
 version = "1.17.0"