diff --git a/docs/source/conf.py b/docs/source/conf.py
index bbe2c97c..a1b4d782 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -26,7 +26,7 @@
 author = "Charles Tapley Hoyt"
 
 # The full version, including alpha/beta/rc tags.
-release = "0.5.556"
+release = "0.5.557-dev"
 
 # The short X.Y version.
 parsed_version = re.match(
diff --git a/pyproject.toml b/pyproject.toml
index 14965544..b825c6b1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "bioversions"
-version = "0.5.556"
+version = "0.5.557-dev"
 description = "Get the current version for biological databases"
 readme = "README.md"
 authors = [
@@ -222,7 +222,7 @@ known-first-party = [
 docstring-code-format = true
 
 [tool.bumpversion]
-current_version = "0.5.556"
+current_version = "0.5.557-dev"
 parse = "(?P<major>\\d+)\\.(?P<minor>\\d+)\\.(?P<patch>\\d+)(?:-(?P<release>[0-9A-Za-z-]+(?:\\.[0-9A-Za-z-]+)*))?(?:\\+(?P<build>[0-9A-Za-z-]+(?:\\.[0-9A-Za-z-]+)*))?"
 serialize = [
     "{major}.{minor}.{patch}-{release}+{build}",
diff --git a/src/bioversions/version.py b/src/bioversions/version.py
index 4287a9c8..d4028d22 100644
--- a/src/bioversions/version.py
+++ b/src/bioversions/version.py
@@ -7,7 +7,7 @@
     "VERSION",
 ]
 
-VERSION = "0.5.556"
+VERSION = "0.5.557-dev"
 
 
 def get_git_hash() -> str: