diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 91142d39..ab1399b0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,12 +18,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.10", "3.11"]
         ctapipe-version: ["0.19.3", "0.20.0"]
         include:
-          # ctapipe 0.21 requires >= 3.10
+          # ctapipe >=0.21 requires >= 3.10
           - python-version: "3.12"
             ctapipe-version: "0.21.2"
+          - python-version: "3.12"
+            ctapipe-version: "0.22.0"
 
     defaults:
       run:
@@ -53,7 +55,8 @@ jobs:
           CTAPIPE_VERSION: ${{ matrix.ctapipe-version }}
         run: |
           pip install -e .
-          pip install pytest-cov "ctapipe==$CTAPIPE_VERSION"
+          # TODO: remove pypi pin when dropping support for ctapipe <0.21
+          pip install pytest-cov "ctapipe==$CTAPIPE_VERSION" "scipy<1.14a0"
           ctapipe-info --version | grep "$CTAPIPE_VERSION"
           git describe --tags
 
diff --git a/environment.yml b/environment.yml
index f9df547e..f474fe46 100644
--- a/environment.yml
+++ b/environment.yml
@@ -18,4 +18,4 @@ dependencies:
   - zlib
   - pip
   - h5py
-  - scipy <1.14
+  - scipy
diff --git a/setup.cfg b/setup.cfg
index 66d3406c..c8a65f29 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -31,10 +31,10 @@ python_requires = >=3.9
 zip_safe = False
 install_requires=
     astropy >=5.2,<7.0.0a0
-    ctapipe >=0.19.0,<0.22.0a0
+    ctapipe >=0.19.0,<0.23.0a0
     protozfits ~=2.4
     numpy >=1.20
-    scipy <1.14
+    scipy
 
 [options.package_data]
 * = resources/*
diff --git a/src/ctapipe_io_lst/anyarray_dtypes.py b/src/ctapipe_io_lst/anyarray_dtypes.py
index d7762c4e..268a5db9 100644
--- a/src/ctapipe_io_lst/anyarray_dtypes.py
+++ b/src/ctapipe_io_lst/anyarray_dtypes.py
@@ -70,4 +70,5 @@ def parse_tib_10MHz_counter(counter):
 
     The counter is stored using 3 uint8 values forming a 24-bit unsigned integer
     """
+    counter = counter.astype(np.uint32)
     return counter[0] + (counter[1] << 8) + (counter[2] << 16)