diff --git a/holoviews/core/data/cudf.py b/holoviews/core/data/cudf.py
index a704e33837..92ea028d16 100644
--- a/holoviews/core/data/cudf.py
+++ b/holoviews/core/data/cudf.py
@@ -255,7 +255,7 @@ def select(cls, dataset, selection_mask=None, **selection):
 
         indexed = cls.indexed(dataset, selection)
         if selection_mask is not None:
-            df = df.iloc[selection_mask]
+            df = df.loc[selection_mask]
         if indexed and len(df) == 1 and len(dataset.vdims) == 1:
             return df[dataset.vdims[0].name].iloc[0]
         return df
diff --git a/pixi.toml b/pixi.toml
index ec1ee8ef0c..cbf43f7536 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -179,9 +179,9 @@ NUMBA_CUDA_LOW_OCCUPANCY_WARNINGS = "0"
 
 [feature.test-gpu.dependencies]
 cuda-version = "12.2.*"
-cudf = "25.06.*"
+cudf = "25.08.*"
 cupy = "*"
-# cuspatial = "*"  # https://github.com/rapidsai/cuspatial/issues/1563#issuecomment-2845966364
+# cuspatial = "*"  # Paused development: https://docs.rapids.ai/notices/rsn0045/
 librmm = { version = "*", channel = "rapidsai" }
 rmm = { version = "*", channel = "rapidsai" }