diff --git a/verified_cogen/args.py b/verified_cogen/args.py
index c426b82..29d57b9 100644
--- a/verified_cogen/args.py
+++ b/verified_cogen/args.py
@@ -51,7 +51,9 @@ def get_default_parser():
         "-s", "--output-style", choices=["stats", "full"], default="full"
     )
     parser.add_argument("--filter-by-ext", help="filter by extension", default=None)
-    parser.add_argument("--log-tries", help="Save output of every try to given dir", default=None)
+    parser.add_argument(
+        "--log-tries", help="Save output of every try to given dir", default=None
+    )
     return parser
 
 
diff --git a/verified_cogen/main.py b/verified_cogen/main.py
index a22f412..e01d63f 100644
--- a/verified_cogen/main.py
+++ b/verified_cogen/main.py
@@ -135,7 +135,7 @@ def main():
             ),
             logger,
             verifier,
-            log_tries
+            log_tries,
         )
         for file in files:
             with open(file) as f:
diff --git a/verified_cogen/runners/__init__.py b/verified_cogen/runners/__init__.py
index f3d29d1..2a21bb9 100644
--- a/verified_cogen/runners/__init__.py
+++ b/verified_cogen/runners/__init__.py
@@ -16,7 +16,13 @@ class Runner:
     verifier: Verifier
     log_tries: Optional[pathlib.Path]
 
-    def __init__(self, llm: LLM, logger: Logger, verifier: Verifier, log_tries: Optional[pathlib.Path] = None):
+    def __init__(
+        self,
+        llm: LLM,
+        logger: Logger,
+        verifier: Verifier,
+        log_tries: Optional[pathlib.Path] = None,
+    ):
         self.llm = llm
         self.logger = logger
         self.verifier = verifier
@@ -83,7 +89,9 @@ def try_fixing(
     ) -> Optional[int]:
         tries = total_tries
         while tries > 0:
-            verification_result = self.verify_program(name, total_tries - tries + 1, inv_prg)
+            verification_result = self.verify_program(
+                name, total_tries - tries + 1, inv_prg
+            )
             if verification_result is None:
                 self.logger.info("Verification timed out")
                 tries -= 1