diff --git a/.bumpversion.toml b/.bumpversion.toml
index b158fc7aa..d7bfb7de9 100644
--- a/.bumpversion.toml
+++ b/.bumpversion.toml
@@ -23,6 +23,8 @@ allow_dirty = true
 commit = true
 message = "Bump version: {current_version} → {new_version}"
 commit_args = ""
+# bump-my-version >=1.4.0 rejects pre_commit_hooks containing shell syntax unless opted in.
+allow_shell_hooks = true
 
 # Java maven files
 pre_commit_hooks = [
diff --git a/python/.bumpversion.toml b/python/.bumpversion.toml
index 6fe49c85f..02d3d4cf8 100644
--- a/python/.bumpversion.toml
+++ b/python/.bumpversion.toml
@@ -23,6 +23,8 @@ allow_dirty = true
 commit = true
 message = "Bump version: {current_version} → {new_version}"
 commit_args = ""
+# bump-my-version >=1.4.0 rejects pre_commit_hooks containing shell syntax unless opted in.
+allow_shell_hooks = true
 
 # Update Cargo.lock after version bump
 pre_commit_hooks = [