diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 49ce021..3eac6d1 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -15,7 +15,7 @@ updates:
           - "minor"
           - "patch"
     # The `all` extra must remain jointly resolvable. These candidates violate
-    # upstream constraints: TrustMark still requires NumPy 1.x, OpenCV 4.13+
+    # upstream constraints: TrustMark still requires NumPy 1.x, OpenCV 4.12+
     # requires NumPy 2 on newer Python versions, and this project keeps tokenizers
     # below 0.23 for the stable Transformers path. Keep Dependabot on the
     # compatible lines until those constraints move.
@@ -25,7 +25,7 @@ updates:
           - ">=2"
       - dependency-name: "opencv-python-headless"
         versions:
-          - ">=4.13"
+          - ">=4.12"
       - dependency-name: "tokenizers"
         versions:
           - ">=0.23"
diff --git a/tests/test_dependabot.py b/tests/test_dependabot.py
index 3524f03..041da9a 100644
--- a/tests/test_dependabot.py
+++ b/tests/test_dependabot.py
@@ -7,5 +7,5 @@ def test_dependabot_blocks_opencv_releases_that_require_numpy_2() -> None:
     config = Path(".github/dependabot.yml").read_text()
 
     opencv_ignore = config.split('dependency-name: "opencv-python-headless"', maxsplit=1)[1]
-    assert '"<4.13"' not in opencv_ignore
-    assert '- ">=4.13"' in opencv_ignore
+    assert '"<4.12"' not in opencv_ignore
+    assert '- ">=4.12"' in opencv_ignore