diff --git a/jupyter_server/_version.py b/jupyter_server/_version.py
index 3308479ac9..34cfb25ab7 100644
--- a/jupyter_server/_version.py
+++ b/jupyter_server/_version.py
@@ -2,5 +2,5 @@
 store the current version info of the server.
 
 """
-version_info = (1, 15, 6, "", "")
+version_info = (1, 15, 7, ".dev", "0")
 __version__ = ".".join(map(str, version_info[:3])) + "".join(version_info[3:])
diff --git a/pyproject.toml b/pyproject.toml
index 2fa0ba4b51..7055f94979 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ timeout = 300
 skip = ["check-links"]
 
 [tool.tbump.version]
-current = "1.15.6"
+current = "1.15.7.dev0"
 regex = '''
   (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)
   ((?P<channel>a|b|rc|.dev)(?P<release>\d+))?