diff --git a/environment.yml b/environment.yml
index 190b27ae2..f12041518 100644
--- a/environment.yml
+++ b/environment.yml
@@ -4,7 +4,7 @@ name: plantcv
 dependencies:
   - python=3.13
   - matplotlib>=1.5
-  - numpy>=2
+  - numpy>=1.26
   - pandas
   - python-dateutil
   - scipy<1.16
@@ -23,7 +23,7 @@ dependencies:
   - ipympl
   - nodejs
   - jupyterlab
-  - altair
+  - altair<6
   - vl-convert-python
   - git
   - flyr
diff --git a/plantcv/plantcv/threshold/threshold_methods.py b/plantcv/plantcv/threshold/threshold_methods.py
index 62ff850ef..29b32d0e9 100644
--- a/plantcv/plantcv/threshold/threshold_methods.py
+++ b/plantcv/plantcv/threshold/threshold_methods.py
@@ -323,7 +323,7 @@ def calc_texture(inputs):
         float
             Texture value
         """
-        inputs = np.reshape(inputs, newshape=[ksize, ksize])
+        inputs = np.reshape(inputs, (ksize, ksize))
         inputs = inputs.astype(np.uint8)
         # Greycomatrix takes image, distance offset, angles (in radians), symmetric, and normed
         # http://scikit-image.org/docs/dev/api/skimage.feature.html#skimage.feature.graycomatrix
diff --git a/pyproject.toml b/pyproject.toml
index 7a582ba97..9441bc3db 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ license = {file = "LICENSE"}
 dynamic = ["version"]
 dependencies = [
     "matplotlib >= 1.5",
-    "numpy >= 2",
+    "numpy >= 1.26",
     "pandas",
     "python-dateutil",
     "scipy <1.16",