diff --git a/ipykernel/_version.py b/ipykernel/_version.py
index 4f18c3a68..c4b558ffb 100644
--- a/ipykernel/_version.py
+++ b/ipykernel/_version.py
@@ -4,7 +4,7 @@
 import re
 
 # Version string must appear intact for tbump versioning
-__version__ = '6.3.0'
+__version__ = '6.3.1'
 
 # Build up version_info tuple for backwards compatibility
 pattern = r'(?P<major>\d+).(?P<minor>\d+).(?P<patch>\d+)(?P<rest>.*)'
diff --git a/pyproject.toml b/pyproject.toml
index a2d6b8147..d8f33fe5b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ ignore = []
 skip = ["check-links"]
 
 [tool.tbump.version]
-current = "6.3.0"
+current = "6.3.1"
 regex = '''
   (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)
   ((?P<channel>a|b|rc|.dev)(?P<release>\d+))?