diff --git a/em_workflows/dm_conversion/flow.py b/em_workflows/dm_conversion/flow.py
index dd735b81..dfa4b526 100644
--- a/em_workflows/dm_conversion/flow.py
+++ b/em_workflows/dm_conversion/flow.py
@@ -2,7 +2,7 @@
 from typing import Optional
 
 from prefect import flow, task, unmapped, allow_failure
-from pytools.meta import is_int16
+from pytools.meta import is_int16, is_16bit
 from pytools.convert import file_to_uint8
 
 from em_workflows.utils import utils
@@ -66,7 +66,7 @@ def convert_if_int16_tiff(file_path: FilePath) -> None:
     """
     if not (
             file_path.fp_in.suffix.strip(".").lower() in TIFS_EXT
-            and is_int16(file_path.fp_in)
+            and is_16bit(file_path.fp_in)
     ):
         return
     tif_8_bit = file_path.gen_output_fp(out_fname="as_8_bit.tif")
diff --git a/requirements.txt b/requirements.txt
index f5d65e4f..65ec8f1b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,4 @@ prefect==2.19.1
 prefect[dask]
 dask-jobqueue
 natsort
-pytools@https://github.com/niaid/tomojs-pytools/releases/download/v3.1.1/pytools-3.1.1-py3-none-any.whl
+pytools@https://github.com/niaid/tomojs-pytools/releases/download/v3.2.0/pytools-3.2.0-py3-none-any.whl