diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 94e7eef..26ed86d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -4,13 +4,13 @@ ci:
 
 repos:
   - repo: https://github.com/adamchainz/blacken-docs
-    rev: "1.19.1"
+    rev: "1.20.0"
     hooks:
       - id: blacken-docs
         additional_dependencies: [black==24.*]
 
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: "v5.0.0"
+    rev: "v6.0.0"
     hooks:
       - id: check-added-large-files
       - id: check-case-conflict
@@ -33,14 +33,14 @@ repos:
       - id: rst-inline-touching-normal
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: "v0.12.5"
+    rev: "v0.15.12"
     hooks:
       - id: ruff
         args: ["--fix", "--show-fixes"]
       - id: ruff-format
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: "v1.17.0"
+    rev: "v2.0.0"
     hooks:
       - id: mypy
         files: dafits|tests
@@ -49,14 +49,14 @@ repos:
           - pytest
 
   - repo: https://github.com/codespell-project/codespell
-    rev: "v2.4.1"
+    rev: "v2.4.2"
     hooks:
       - id: codespell
         additional_dependencies:
           - tomli
 
   - repo: https://github.com/shellcheck-py/shellcheck-py
-    rev: "v0.10.0.1"
+    rev: "v0.11.0.1"
     hooks:
       - id: shellcheck
 
@@ -69,13 +69,13 @@ repos:
         exclude: .pre-commit-config.yaml
 
   - repo: https://github.com/abravalheri/validate-pyproject
-    rev: "v0.24.1"
+    rev: "v0.25"
     hooks:
       - id: validate-pyproject
         additional_dependencies: ["validate-pyproject-schema-store[all]"]
 
   - repo: https://github.com/python-jsonschema/check-jsonschema
-    rev: "0.33.2"
+    rev: "0.37.2"
     hooks:
       - id: check-dependabot
       - id: check-github-workflows
diff --git a/dafits/io.py b/dafits/io.py
index 2c86425..0a307e5 100644
--- a/dafits/io.py
+++ b/dafits/io.py
@@ -103,7 +103,7 @@ def _init_large_file(
         overwrite=overwrite,
     )
 
-    bytes_per_value = BIT_DICT.get(abs(output_header["BITPIX"]), None)
+    bytes_per_value = BIT_DICT.get(abs(output_header["BITPIX"]))
     msg = f"Header BITPIX={output_header['BITPIX']}, bytes_per_value={bytes_per_value}"
     logger.info(msg)
     if bytes_per_value is None: