diff --git a/pixi.lock b/pixi.lock
index 9a593a3..9a547f7 100644
--- a/pixi.lock
+++ b/pixi.lock
@@ -231,7 +231,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-64/zlib-ng-2.3.3-hce19668_1.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/zstd-1.5.7-hb78ec9c_7.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/_python_abi3_support-1.0-hd8ed1ab_3.conda
-      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-3.0.1-pyhecae5ae_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-2.4.0-pyhd8ed1ab_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/anyio-4.16.0-pyh5ded981_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/attrs-26.1.0-pyhcf101f3_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/awscliv2-2.3.1-pyhd8ed1ab_1.conda
@@ -371,7 +371,7 @@ environments:
       - pypi: https://files.pythonhosted.org/packages/f5/98/972fa03c9a6e1cc9184a28ea0354af50a6764bb172fe2d0751798a295f07/types_s3transfer-0.19.3-py3-none-any.whl
       osx-arm64:
       - conda: https://conda.anaconda.org/conda-forge/noarch/_python_abi3_support-1.0-hd8ed1ab_3.conda
-      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-3.0.1-pyhecae5ae_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-2.4.0-pyhd8ed1ab_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/anyio-4.16.0-pyh5ded981_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/attrs-26.1.0-pyhcf101f3_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/awscliv2-2.3.1-pyhd8ed1ab_1.conda
@@ -940,7 +940,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-64/zlib-ng-2.3.3-hce19668_1.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/zstd-1.5.7-hb78ec9c_7.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/_python_abi3_support-1.0-hd8ed1ab_3.conda
-      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-3.0.1-pyhecae5ae_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-2.4.0-pyhd8ed1ab_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/annotated-types-0.8.0-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/anyio-4.16.0-pyh5ded981_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/asttokens-3.0.2-pyhd8ed1ab_0.conda
@@ -1096,7 +1096,7 @@ environments:
       - pypi: https://files.pythonhosted.org/packages/f5/98/972fa03c9a6e1cc9184a28ea0354af50a6764bb172fe2d0751798a295f07/types_s3transfer-0.19.3-py3-none-any.whl
       osx-arm64:
       - conda: https://conda.anaconda.org/conda-forge/noarch/_python_abi3_support-1.0-hd8ed1ab_3.conda
-      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-3.0.1-pyhecae5ae_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-2.4.0-pyhd8ed1ab_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/annotated-types-0.8.0-pyhd8ed1ab_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/anyio-4.16.0-pyh5ded981_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/asttokens-3.0.2-pyhd8ed1ab_0.conda
@@ -1669,7 +1669,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-64/zlib-ng-2.3.3-hce19668_1.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/zstd-1.5.7-hb78ec9c_7.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/_python_abi3_support-1.0-hd8ed1ab_3.conda
-      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-3.0.1-pyhecae5ae_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-2.4.0-pyhd8ed1ab_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/anyio-4.16.0-pyh5ded981_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/attrs-26.1.0-pyhcf101f3_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/awscliv2-2.3.1-pyhd8ed1ab_1.conda
@@ -1786,7 +1786,7 @@ environments:
       - pypi: https://files.pythonhosted.org/packages/e2/a4/88f9e10498759121060b8050a1554753dfc04df39bbbcc7aad9ecc8d9440/s3transfer-0.19.3-py3-none-any.whl
       osx-arm64:
       - conda: https://conda.anaconda.org/conda-forge/noarch/_python_abi3_support-1.0-hd8ed1ab_3.conda
-      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-3.0.1-pyhecae5ae_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/noarch/affine-2.4.0-pyhd8ed1ab_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/anyio-4.16.0-pyh5ded981_1.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/attrs-26.1.0-pyhcf101f3_0.conda
       - conda: https://conda.anaconda.org/conda-forge/noarch/awscliv2-2.3.1-pyhd8ed1ab_1.conda
@@ -7660,19 +7660,18 @@ packages:
   run_exports: {}
   size: 8144
   timestamp: 1784221492234
-- conda: https://conda.anaconda.org/conda-forge/noarch/affine-3.0.1-pyhecae5ae_0.conda
-  sha256: 8801cd5b4e0f0203b7a18e8def15929f3413e93e2da88d5b918b735454106f85
-  md5: aeb404cab9e719a49264ab40928f80c8
+- conda: https://conda.anaconda.org/conda-forge/noarch/affine-2.4.0-pyhd8ed1ab_1.conda
+  sha256: 0deeaf0c001d5543719db9b2686bc1920c86c7e142f9bec74f35e1ce611b1fc2
+  md5: 8c4061f499edec6b8ac7000f6d586829
   depends:
-  - attrs >=21.3.0
-  - python >=3.10
+  - python >=3.9
   license: BSD-3-Clause
   license_family: BSD
   purls:
   - pkg:pypi/affine
   run_exports: {}
-  size: 22619
-  timestamp: 1788134268940
+  size: 19164
+  timestamp: 1733762153202
 - conda: https://conda.anaconda.org/conda-forge/noarch/annotated-types-0.8.0-pyhd8ed1ab_0.conda
   sha256: b8fcb994134d3918d1c64a9d62f4168ff85d5bfb89e698102fe4ed679fe0df24
   md5: 108c928d2a8551832dbc762b535e90bb
diff --git a/pixi.toml b/pixi.toml
index 767f0b2..e46db6e 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -33,6 +33,9 @@ libgdal-hdf4 = ">=3.10.3,<4"
 libgdal-hdf5 = ">=3.10.3,<4"
 libgdal-jp2openjpeg = "*"
 rasterio = "*"
+# hls-cmr_stac (<=v1.9) JSON-dumps rasterio's transform directly, which needs
+# affine.Affine to be a tuple subclass (dropped in affine 3)
+affine = ">=2,<3"
 pyproj = ">=3.7.2,<4"
 shapely = ">=2,<3"
 click = "*"