diff --git a/README.md b/README.md
index b3c247a..521af78 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ python -m pip install -e ".[dev]"
 4. The template already includes a sample task ("Thresholding Task"). Whenever
 you change its input parameters or docstring, re-run
 ```console
-python src/fractal_helper_tasks/dev/update_manifest.py
+python src/fractal_helper_tasks/dev/create_manifest.py
 git add src/fractal_helper_tasks/__FRACTAL_MANIFEST__.json
 git commit -m'Update `__FRACTAL_MANIFEST__.json`'
 git push origin main
diff --git a/src/fractal_helper_tasks/__FRACTAL_MANIFEST__.json b/src/fractal_helper_tasks/__FRACTAL_MANIFEST__.json
index 9746921..30c3cdc 100644
--- a/src/fractal_helper_tasks/__FRACTAL_MANIFEST__.json
+++ b/src/fractal_helper_tasks/__FRACTAL_MANIFEST__.json
@@ -7,7 +7,7 @@
         "has_t": false
       },
       "tags": [
-        "Singelton time dimension"
+        "Singleton time dimension"
       ],
       "executable_non_parallel": "drop_t_dimension.py",
       "meta_non_parallel": {
diff --git a/src/fractal_helper_tasks/dev/task_list.py b/src/fractal_helper_tasks/dev/task_list.py
index 797b0a1..1ee8ba7 100644
--- a/src/fractal_helper_tasks/dev/task_list.py
+++ b/src/fractal_helper_tasks/dev/task_list.py
@@ -8,7 +8,7 @@
         executable="drop_t_dimension.py",
         meta={"cpus_per_task": 2, "mem": 8000},
         output_types=dict(has_t=False),
-        tags=["Singelton time dimension"],
+        tags=["Singleton time dimension"],
     ),
     ParallelTask(
         input_types=dict(is_3D=False),
diff --git a/src/fractal_helper_tasks/drop_t_dimension.py b/src/fractal_helper_tasks/drop_t_dimension.py
index 74f0fda..9c59de5 100644
--- a/src/fractal_helper_tasks/drop_t_dimension.py
+++ b/src/fractal_helper_tasks/drop_t_dimension.py
@@ -5,7 +5,7 @@
 #
 # This file is derived from a Fractal task core task developed by
 # Tommaso Comparin & Marco Franzon
-"""Task to remove singelton T dimension from an OME-Zarr."""
+"""Task to remove singleton T dimension from an OME-Zarr."""
 
 import logging
 from typing import Any