diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 284f51a..038d3ce 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -26,13 +26,10 @@ jobs:
         with:
           name: artifact
           path: dist/*
-      - name: Make sure version in pyproject.toml and pixi.toml are in sync
-        run: |
-          [ "$(yq '.project.version' pixi.toml)" = "$(yq '.project.version' pyproject.toml)" ]
       - uses: Quantco/ui-actions/version-metadata@v1
         id: version-metadata
         with:
-          file: ./pixi.toml
+          file: ./pyproject.toml
           token: ${{ secrets.GITHUB_TOKEN }}
           version-extraction-override: 'regex:version = "(.*)"'
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5b3c5a0..58e9ace 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,6 +30,7 @@ jobs:
           - { PYTHON_VERSION: '3.8', SKLEARN_VERSION: '', LGBM_VERSION: 'lightgbm=3.3' }
           - { PYTHON_VERSION: '3.8', SKLEARN_VERSION: '', LGBM_VERSION: 'lightgbm=4.0' }
           - { PYTHON_VERSION: '3.8', SKLEARN_VERSION: '', LGBM_VERSION: 'lightgbm=4.1' }
+          - { PYTHON_VERSION: '3.8', SKLEARN_VERSION: '', LGBM_VERSION: 'lightgbm=4.2' }
           - { PYTHON_VERSION: '3.8', SKLEARN_VERSION: '', LGBM_VERSION: '' }
           - { PYTHON_VERSION: '3.9', SKLEARN_VERSION: '', LGBM_VERSION: '' }
           - { PYTHON_VERSION: '3.10', SKLEARN_VERSION: '', LGBM_VERSION: '' }
diff --git a/environment-deprecated.yml b/environment-deprecated.yml
index 569d0ee..40badf6 100644
--- a/environment-deprecated.yml
+++ b/environment-deprecated.yml
@@ -4,7 +4,7 @@ channels:
   - conda-forge
   - nodefaults
 dependencies:
-  - lightgbm >=3.2,<4.2
+  - lightgbm >=3.2,<4.3
   - numpy
   - python >=3.8
   - pre-commit
diff --git a/pixi.toml b/pixi.toml
index f67521e..1fc738d 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -1,6 +1,5 @@
 [project] # TODO: move to pyproject.toml once pixi supports it
 name = "slim-trees"
-version = "0.2.5"
 description = "A python package for efficient pickling of ML models."
 authors = ["Pavel Zwerschke <pavelzw@gmail.com>"]
 channels = ["conda-forge"]
@@ -14,7 +13,7 @@ lint = "pre-commit run -a"
 [dependencies]
 python = ">=3.8"
 pip = "*"
-lightgbm = ">=3.2,<4.2"
+lightgbm = ">=3.2,<4.3"
 numpy = "*"
 pre-commit = "*"
 pandas = "*"
diff --git a/pyproject.toml b/pyproject.toml
index 26d9fe8..a74da7b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "hatchling.build"
 [project]
 name = "slim-trees"
 description = "A python package for efficient pickling of ML models."
-version = "0.2.5"
+version = "0.2.6"
 readme = "README.md"
 license = "MIT"
 requires-python = ">=3.8"
@@ -26,7 +26,7 @@ dependencies = [
 
 [project.optional-dependencies]
 lightgbm = [
-    "lightgbm >=3.2,<4.2",
+    "lightgbm >=3.2,<4.3",
 ]
 scikit-learn = [
     "scikit-learn >=1.1.0,<1.4",