diff --git a/src/pyobo/constants.py b/src/pyobo/constants.py
index 4eb43d55..e741a678 100644
--- a/src/pyobo/constants.py
+++ b/src/pyobo/constants.py
@@ -10,8 +10,7 @@
 import click
 import pystow
 
-__all__ = ["RAW_DIRECTORY", "DATABASE_DIRECTORY", "SPECIES_REMAPPING",
-           "VERSION_PINS"]
+__all__ = ["RAW_DIRECTORY", "DATABASE_DIRECTORY", "SPECIES_REMAPPING", "VERSION_PINS"]
 
 logger = logging.getLogger(__name__)
 
@@ -109,8 +108,7 @@
         invalid_prefixes = []
         for prefix, version in VERSION_PINS.items():
             if not isinstance(prefix, str) or not isinstance(version, str):
-                logger.error(
-                    f"The prefix:{prefix} and version:{version} name must both be strings")
+                logger.error(f"The prefix:{prefix} and version:{version} name must both be strings")
                 invalid_prefixes.append(prefix)
         for prefix in invalid_prefixes:
             VERSION_PINS.pop(prefix)