diff --git a/Makefile b/Makefile
index 859e207..3316e1b 100644
--- a/Makefile
+++ b/Makefile
@@ -37,3 +37,6 @@ lint-fix:
 .PHONY: lint-check
 lint-check:
 	ruff check habanero
+
+format:
+	ruff format habanero
diff --git a/habanero/cn/cn.py b/habanero/cn/cn.py
index f26f143..f68135b 100644
--- a/habanero/cn/cn.py
+++ b/habanero/cn/cn.py
@@ -8,7 +8,7 @@ def content_negotiation(
     style: str = "apa",
     locale: str = "en-US",
     url: str = None,
-    **kwargs
+    **kwargs,
 ) -> str:
     """
     Get citations in various formats from CrossRef
diff --git a/habanero/counts/counts.py b/habanero/counts/counts.py
index 3c6f506..fadbbc3 100644
--- a/habanero/counts/counts.py
+++ b/habanero/counts/counts.py
@@ -10,7 +10,7 @@ def citation_count(
     doi: str,
     url: str = "http://www.crossref.org/openurl/",
     key: str = "cboettig@ropensci.org",
-    **kwargs
+    **kwargs,
 ) -> int:
     """
     Get a citation count with a DOI
diff --git a/habanero/crossref/crossref.py b/habanero/crossref/crossref.py
index eb6942f..a39198f 100644
--- a/habanero/crossref/crossref.py
+++ b/habanero/crossref/crossref.py
@@ -203,7 +203,7 @@ def works(
         cursor_max: float = 5000,
         progress_bar: bool = False,
         warn: bool = False,
-        **kwargs
+        **kwargs,
     ) -> dict:
         """
         Search Crossref works
@@ -357,7 +357,7 @@ def works(
                 None,
                 progress_bar,
                 warn,
-                **kwargs
+                **kwargs,
             )
         else:
             return Request(
@@ -378,7 +378,7 @@ def works(
                 cursor_max,
                 None,
                 progress_bar,
-                **kwargs
+                **kwargs,
             ).do_request(should_warn=warn)
 
     def members(
@@ -398,7 +398,7 @@ def members(
         cursor_max: float = 5000,
         progress_bar: bool = False,
         warn: bool = False,
-        **kwargs
+        **kwargs,
     ) -> dict:
         """
         Search Crossref members
@@ -496,7 +496,7 @@ def members(
             None,
             progress_bar,
             warn,
-            **kwargs
+            **kwargs,
         )
 
     def prefixes(
@@ -515,7 +515,7 @@ def prefixes(
         cursor_max: float = 5000,
         progress_bar: bool = False,
         warn: bool = False,
-        **kwargs
+        **kwargs,
     ) -> dict:
         """
         Search Crossref prefixes
@@ -613,7 +613,7 @@ def prefixes(
             cursor_max=cursor_max,
             progress_bar=progress_bar,
             should_warn=warn,
-            **kwargs
+            **kwargs,
         )
 
     def funders(
@@ -633,7 +633,7 @@ def funders(
         cursor_max: float = 5000,
         progress_bar: bool = False,
         warn: bool = False,
-        **kwargs
+        **kwargs,
     ) -> dict:
         """
         Search Crossref funders
@@ -743,7 +743,7 @@ def funders(
             None,
             progress_bar,
             warn,
-            **kwargs
+            **kwargs,
         )
 
     def journals(
@@ -763,7 +763,7 @@ def journals(
         cursor_max: float = 5000,
         progress_bar: bool = False,
         warn: bool = False,
-        **kwargs
+        **kwargs,
     ) -> dict:
         """
         Search Crossref journals
@@ -868,7 +868,7 @@ def journals(
             None,
             progress_bar,
             warn,
-            **kwargs
+            **kwargs,
         )
 
     def types(
@@ -888,7 +888,7 @@ def types(
         cursor_max: float = 5000,
         progress_bar: bool = False,
         warn: bool = False,
-        **kwargs
+        **kwargs,
     ) -> dict:
         """
         Search Crossref types
@@ -972,7 +972,7 @@ def types(
             None,
             progress_bar,
             warn,
-            **kwargs
+            **kwargs,
         )
 
     def licenses(
@@ -983,7 +983,7 @@ def licenses(
         sort: str = None,
         order: str = None,
         facet: Union[str, bool] = None,
-        **kwargs
+        **kwargs,
     ) -> dict:
         """
         Search Crossref licenses
@@ -1028,7 +1028,7 @@ def licenses(
             None,
             None,
             None,
-            **kwargs
+            **kwargs,
         )
         return res
 
@@ -1081,7 +1081,7 @@ def registration_agency(self, ids: Union[List[str], str], **kwargs) -> list:
             None,
             None,
             True,
-            **kwargs
+            **kwargs,
         )
         if not isinstance(res, list):
             k = []
@@ -1127,7 +1127,7 @@ def random_dois(self, sample: int = 10, **kwargs) -> list:
             None,
             None,
             None,
-            **kwargs
+            **kwargs,
         )
         return [z["DOI"] for z in res["message"]["items"]]
 
diff --git a/habanero/request_class.py b/habanero/request_class.py
index ad35276..6e19d40 100644
--- a/habanero/request_class.py
+++ b/habanero/request_class.py
@@ -42,7 +42,7 @@ def __init__(
         cursor_max=None,
         agency=False,
         progress_bar=False,
-        **kwargs
+        **kwargs,
     ):
         self.mailto = mailto
         self.ua_string = ua_string