diff --git a/pyproject.toml b/pyproject.toml
index cfc90b0df3..7eea48b8a3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,6 +30,7 @@ dependencies = [
     'numcodecs>=0.12',
     'typing_extensions>=4.9',
     'donfig>=0.8.1',
+    'crc32c>=2.4',
 ]
 dynamic = [
   "version",
@@ -54,9 +55,6 @@ keywords = ["Python", "compressed", "ndimensional-arrays", "zarr"]
 fsspec = [
     "fsspec>=2023.10.0",
 ]
-sharding = [
-    "crc32c>=2.4",
-]
 test = [
     "coverage",
     "pytest",