diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 4ad1aa2..f2c2720 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -18,7 +18,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: '3.9'
+          python-version: '3.10'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2c7a688..4fecd6a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9"]
+        python-version: ["3.10"]
     steps:
       - uses: actions/checkout@v4
 
@@ -42,11 +42,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
         os: [ubuntu-latest, macos-latest]
         exclude:
           - os: macos-latest
-            python-version: "3.9"
+            python-version: "3.10"
     continue-on-error: true
 
     steps:
diff --git a/pyproject.toml b/pyproject.toml
index af96815..2a090f7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ license-files = [
     "LICENSE",
 ]
 
-requires-python = ">=3.9,<3.13"
+requires-python = ">=3.10,<3.13"
 dependencies = [
     "spacy>=3.7.0,<3.9.0",
     "scipy",
@@ -45,8 +45,7 @@ dependencies = [
     # numpy needs to be constrained until spacy and nmslib are rebuilt
     "numpy<2.0",
     "joblib",
-    "nmslib>=1.7.3.6; python_version < '3.10'",
-    "nmslib-metabrainz==2.1.3; python_version >= '3.10'",
+    "nmslib-metabrainz==2.1.3",
     "scikit-learn>=0.20.3",
     "pysbd",
 ]