diff --git a/Dockerfile b/Dockerfile
index 9f1df45..d516d4e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,4 +18,5 @@ COPY generate_liabilities.py /app/generate_liabilities.py
 COPY validate_liabilities.py /app/validate_liabilities.py
 COPY test/test_liabilities.py /app/test_liabilities.py
 RUN python /app/test_liabilities.py
-RUN black --check /app/*.py
+RUN ruff check /app/*.py
+RUN ruff format --check /app/*.py
diff --git a/requirements.dev.txt b/requirements.dev.txt
index 2569c7e..ca98c5d 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -1,4 +1,3 @@
-black==22.8.0
 click==8.0.4
 mypy-extensions==1.0.0
 packaging==21.3
@@ -6,3 +5,4 @@ pathspec==0.9.0
 platformdirs==2.4.0
 tomli==1.2.3
 typing_extensions==4.1.1
+ruff==0.5.7
diff --git a/test/test_reserves.py b/test/test_reserves.py
index 1d05295..b73474a 100644
--- a/test/test_reserves.py
+++ b/test/test_reserves.py
@@ -50,7 +50,7 @@ def wait_until_alive(self):
                 time.sleep(1)
                 self.version = self.getnetworkinfo([])["version"]
                 break
-            except Exception as e:
+            except Exception:
                 logging.info("Bitcoin server not responding, sleeping for retry.")
 
 
@@ -211,7 +211,7 @@ def test_reserves(self):
             "--result-file",
             proof_hash + "_result.json",
         ]
-        output = subprocess.check_output(run_args).decode("utf-8")
+        subprocess.check_output(run_args).decode("utf-8")
 
         # Check output file's value
         with open(proof_hash + "_result.json") as f:
@@ -230,7 +230,7 @@ def test_reserves(self):
             "regtest://user:password@127.0.0.1:18443",
             "--reconsider",
         ]
-        output = subprocess.check_output(run_args).decode("utf-8")
+        subprocess.check_output(run_args).decode("utf-8")
         while self.bitcoin.getblockcount([]) != tip_height:
             time.sleep(0.1)
         self.assertEqual(self.bitcoin.getbestblockhash([]), tip_hash)
diff --git a/validate_liabilities.py b/validate_liabilities.py
index fe9c8d8..ef37f3c 100644
--- a/validate_liabilities.py
+++ b/validate_liabilities.py
@@ -103,7 +103,6 @@ def validate_liabilities(block_height, tree, account, nonce, account_nonce, args
         )
 
         # Next validate tree up to root, printing out single proof
-        proof_vector = []
         current_index = leaf_index
 
         proof_nodes = []  # [us,      parent,         ..., n-parent,     root]
diff --git a/validate_reserves.py b/validate_reserves.py
index 7558ab2..8f2d2ea 100755
--- a/validate_reserves.py
+++ b/validate_reserves.py
@@ -1,7 +1,6 @@
 #!/usr/bin/python3
 
 import argparse
-import copy
 from collections import Counter
 import decimal
 import json
@@ -51,7 +50,7 @@ def wait_until_alive(self):
                 time.sleep(1)
                 self.version = self.getnetworkinfo([])["version"]
                 break
-            except Exception as e:
+            except Exception:
                 logging.exception("Bitcoin server not responding, sleeping for retry.")
 
 
@@ -139,7 +138,6 @@ def compile_proofs(proof_data):
             script = script[2:]
             found_vanitykey = 0
             found_pubkeys = 0
-            wrong_keys = False
             ordered_pubkeys = []
             while len(script) > 4:
                 if script[:2] != pubkey_sep:
@@ -236,7 +234,7 @@ def validate_proofs(bitcoin, proof_data, chunk_size=60000):
     block_hash = bitcoin.getblockhash([proof_data["height"]])
     try:
         bitcoin.getblock([block_hash])
-    except Exception as e:
+    except Exception:
         if "pruned":
             raise Exception(
                 "Looks like your node has pruned beyond the reserve snapshot; bailing."