diff --git a/.github/workflows/posix.yml b/.github/workflows/posix.yml
index 871f87d5..ac3f30af 100644
--- a/.github/workflows/posix.yml
+++ b/.github/workflows/posix.yml
@@ -70,19 +70,19 @@ jobs:
         submodules: recursive
         fetch-depth: 0
 
-    - uses: maxim-lobanov/setup-xcode@v1.6.0
+    - uses: maxim-lobanov/setup-xcode@v1.7.0
       if: ${{ matrix.os == 'macos-latest' }}
       with:
         xcode-version: '16.0'
 
-    - uses: maxim-lobanov/setup-xcode@v1.6.0
+    - uses: maxim-lobanov/setup-xcode@v1.7.0
       if: ${{ matrix.os == 'macos-14' }}
       with:
         xcode-version: '15.4'
 
     - name: Set up QEMU
       if: matrix.PLAT == 'ppc64le' || matrix.PLAT == 's390x' || matrix.PLAT == 'riscv64'
-      uses: docker/setup-qemu-action@v3.7.0
+      uses: docker/setup-qemu-action@v4.0.0
       with:
         platforms: all
 
@@ -123,22 +123,9 @@ jobs:
         name: wheels-${{ matrix.os }}-${{ matrix.PLAT }}-${{ matrix.INTERFACE64 }}-${{ matrix.MB_ML_LIBC }}-${{ matrix.MB_ML_VER }}
         path: dist/scipy_openblas*.whl
 
-
-    - uses: conda-incubator/setup-miniconda@v3.3.0
+    - name: Upload to ananconda.org
+      if: ${{ inputs.publish == false && (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch') }}
+      uses: scientific-python/upload-nightly-action@0.6.4
       with:
-        channels: conda-forge
-        channel-priority: true
-        activate-environment: upload
-        miniforge-version: latest
-        conda-remove-defaults: "true"
-
-    - name: Upload
-      # see https://github.com/marketplace/actions/setup-miniconda for why
-      # `-el {0}` is required.
-      shell: bash -el {0}
-      env:
-        ANACONDA_SCIENTIFIC_PYTHON_UPLOAD: ${{ secrets.ANACONDA_SCIENTIFIC_PYTHON_UPLOAD }}
-      run: |
-        conda install -y anaconda-client
-        source tools/upload_to_anaconda_staging.sh
-        upload_wheels
+        artifacts_path: dist
+        anaconda_nightly_upload_token: ${{secrets.ANACONDA_SCIENTIFIC_PYTHON_UPLOAD}}
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index b8034e2c..cf86222d 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -170,7 +170,7 @@ jobs:
         python -m pip install pkgconf
         python -m pkgconf scipy-openblas --cflags
 
-    - uses: conda-incubator/setup-miniconda@v3.1.1
+    - uses: conda-incubator/setup-miniconda@v4.0.1
       with:
         channels: conda-forge
         channel-priority: true
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ac2464b..8eee17f3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## OpenBLAS v0.3.33
+
+### 0.3.33.0.0 (2026-05-03)
+- Update to OpenBLAS 0.3.33
+
 ## OpenBLAS v0.3.31.188 (v0.3.31-188-g4956446c)
 
 ### 0.3.31.188.1 (2026-03-23)
diff --git a/build-openblas.sh b/build-openblas.sh
index 427f6d3f..20145b33 100755
--- a/build-openblas.sh
+++ b/build-openblas.sh
@@ -7,5 +7,6 @@ before_build
 
 echo "------ CLEAN CODE --------"
 clean_code $OPENBLAS_COMMIT
+sed -e "s/^VERSION = .*/VERSION = ${OPENBLAS_VERSION}/" -i.bak OpenBLAS/Makefile.rule
 echo "------ BUILD LIB --------"
 build_lib "$PLAT" "$INTERFACE64"
diff --git a/ci-before-build.sh b/ci-before-build.sh
index d1382e7f..8d063057 100755
--- a/ci-before-build.sh
+++ b/ci-before-build.sh
@@ -15,13 +15,18 @@ else
     version=$(grep "^version =" pyproject.toml | sed 's/version = "//;s/"//')
 fi
 
-# Sanity check, strip off the last (build) number from version, convert - to . in OPENBLAS_COMMIT
-if [[ "${OPENBLAS_COMMIT//-/.}" != *"${version%.*}"* ]]; then
+obcommit=$OPENBLAS_COMMIT
+# add .0 if OPENBLAS_COMMIT is an actual tag
+[[ "$obcommit" == *-* ]] || obcommit="$obcommit.0"
+
+# convert - to . in OPENBLAS_COMMIT
+# strip off the last (build) number from version
+if [[ "${obcommit//-/.}" != *"${version%.*}"* ]]; then
     echo "OPENBLAS_COMMIT $OPENBLAS_COMMIT does not match the pyproject.toml version $version"
     exit -1
 fi
 
-sed -e "s/^VERSION = .*/VERSION = ${version}/" -i.bak OpenBLAS/Makefile.rule
+export OPENBLAS_VERSION=$version
 echo "creating wheel from $OPENBLAS_COMMIT (NIGHTLY is $NIGHTLY)"
 
 case "$PLAT" in
diff --git a/openblas_commit.txt b/openblas_commit.txt
index e8c91502..42bae871 100644
--- a/openblas_commit.txt
+++ b/openblas_commit.txt
@@ -1 +1 @@
-v0.3.31-188-g4956446c
+v0.3.33
diff --git a/pyproject.toml b/pyproject.toml
index 44c7ac9a..d93ec5eb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,8 +8,8 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "scipy-openblas64"
-# v0.3.31-188-g4956446c
-version = "0.3.31.188.1"
+# v0.3.33
+version = "0.3.33.0.0"
 requires-python = ">=3.7"
 description = "Provides OpenBLAS for python packaging"
 readme = "README.md"
diff --git a/tools/build_prepare_wheel.sh b/tools/build_prepare_wheel.sh
index a6ef2604..c25fedeb 100644
--- a/tools/build_prepare_wheel.sh
+++ b/tools/build_prepare_wheel.sh
@@ -18,6 +18,9 @@ tar -C local/scipy_openblas64 --strip-components=2 -xf libs/openblas.tar.gz
 find local/scipy_openblas64/lib -maxdepth 1 -type l -delete
 rm local/scipy_openblas64/lib/*.a
 # Check that the pyproject.toml and the pkgconfig versions agree.
+echo "============ scipy-openblas.pc ======================="
+cat ./local/scipy_openblas64/lib/pkgconfig/scipy-openblas*.pc
+echo "============ scipy-openblas.pc ======================="
 py_version=$(grep "^version" pyproject.toml | sed -e "s/version = \"//")
 pkg_version=$(grep "version=" ./local/scipy_openblas64/lib/pkgconfig/scipy-openblas*.pc | sed -e "s/version=//" | sed -e "s/dev//")
 if [[ -z "$pkg_version" ]]; then