diff --git a/.github/workflows/build-pyoxigraph.yml b/.github/workflows/build-pyoxigraph.yml
index 60b44f8f951f..0c0fbcb55f84 100644
--- a/.github/workflows/build-pyoxigraph.yml
+++ b/.github/workflows/build-pyoxigraph.yml
@@ -56,11 +56,12 @@ jobs:
       PYOXIGRAPH_VERSION: ${{ matrix.version }}
 
     steps:
-      - name: Checkout oxigraph v${{ env.PYOXIGRAPH_VERSION }}
+      - name: Checkout oxigraph ${{ env.PYOXIGRAPH_VERSION }}
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
         with:
           repository: oxigraph/oxigraph
-          ref: v${{ env.PYOXIGRAPH_VERSION }}
+          # Upstream tagged 0.5.12 without the "v" prefix of every other release.
+          ref: ${{ env.PYOXIGRAPH_VERSION == '0.5.12' && env.PYOXIGRAPH_VERSION || format('v{0}', env.PYOXIGRAPH_VERSION) }}
           submodules: true
           persist-credentials: false
 
@@ -95,11 +96,11 @@ jobs:
       PYOXIGRAPH_VERSION: ${{ matrix.version }}
 
     steps:
-      - name: Checkout oxigraph v${{ env.PYOXIGRAPH_VERSION }}
+      - name: Checkout oxigraph ${{ env.PYOXIGRAPH_VERSION }}
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
         with:
           repository: oxigraph/oxigraph
-          ref: v${{ env.PYOXIGRAPH_VERSION }}
+          ref: ${{ env.PYOXIGRAPH_VERSION == '0.5.12' && env.PYOXIGRAPH_VERSION || format('v{0}', env.PYOXIGRAPH_VERSION) }}
           submodules: true
           persist-credentials: false
 
diff --git a/docs/packages/pyoxigraph.yaml b/docs/packages/pyoxigraph.yaml
index 9295f7fe8cf6..aaaafd4a7e4d 100644
--- a/docs/packages/pyoxigraph.yaml
+++ b/docs/packages/pyoxigraph.yaml
@@ -17,3 +17,5 @@ versions:
   - filename: pyoxigraph-0.5.11-cp314-cp314t-manylinux_2_39_riscv64.whl
     sha256: 1aad092b48a18b3992326665ea4b00c5c14f575e1247402a9a65924f96d97bc7
     requires-python: '>=3.8'
+- version: 0.5.12
+- version: 0.5.13