diff --git a/CHANGELOG b/CHANGELOG
index 9e3a914..d100756 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,5 @@
 0.5.0
- - setup: bump dcnum from 0.20.1 to 0.22.0
+ - setup: bump dcnum from 0.20.1 to 0.22.1
 0.4.1
  - enh: make chipstream.gui and chipstream.cli executable as a package
 0.4.0
diff --git a/pyproject.toml b/pyproject.toml
index 0190b05..b6df14b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ classifiers = [
 ]
 license = {text = "GPL version 3.0 or later"}
 dependencies = [
-    "dcnum>=0.22.0",
+    "dcnum>=0.22.1",
     "h5py>=3.0.0, <4",
     "numpy>=1.21, <2",  # CVE-2021-33430
 ]