diff --git a/target_s3/formats/format_base.py b/target_s3/formats/format_base.py
index 216232a..ed10062 100644
--- a/target_s3/formats/format_base.py
+++ b/target_s3/formats/format_base.py
@@ -117,23 +117,55 @@ def create_key(self) -> str:
             grain = DATE_GRAIN[self.config["append_date_to_prefix_grain"].lower()]
             partition_name_enabled = False
             if self.config["partition_name_enabled"]:
-                partition_name_enabled = self.config["partition_name_enabled"]   
-            folder_path += self.create_folder_structure(batch_start, grain, partition_name_enabled)
+                partition_name_enabled = self.config["partition_name_enabled"]
+            folder_path += self.create_folder_structure(
+                batch_start, grain, partition_name_enabled
+            )
         if self.config["append_date_to_filename"]:
             grain = DATE_GRAIN[self.config["append_date_to_filename_grain"].lower()]
             file_name += f"{self.create_file_structure(batch_start, grain)}"
 
         return f"{folder_path}{file_name}"
 
-    def create_folder_structure(self, batch_start: datetime, grain: int, partition_name_enabled: bool) -> str:
+    def create_folder_structure(
+        self, batch_start: datetime, grain: int, partition_name_enabled: bool
+    ) -> str:
         ret = ""
-        ret += f"{'year=' if partition_name_enabled        else  ''}{batch_start.year}/" if grain <= DATE_GRAIN["year"] else ""
-        ret += f"{'month=' if partition_name_enabled       else  ''}{batch_start.month:02}/" if grain <= DATE_GRAIN["month"] else ""
-        ret += f"{'day=' if partition_name_enabled         else  ''}{batch_start.day:02}/" if grain <= DATE_GRAIN["day"] else ""
-        ret += f"{'hour=' if partition_name_enabled        else  ''}{batch_start.hour:02}/" if grain <= DATE_GRAIN["hour"] else ""
-        ret += f"{'minute=' if partition_name_enabled      else  ''}{batch_start.minute:02}/" if grain <= DATE_GRAIN["minute"] else ""
-        ret += f"{'second=' if partition_name_enabled      else  ''}{batch_start.second:02}/" if grain <= DATE_GRAIN["second"] else ""
-        ret += f"{'microsecond=' if partition_name_enabled else  ''}{batch_start.microsecond}/" if grain <= DATE_GRAIN["microsecond"] else ""
+        ret += (
+            f"{'year=' if partition_name_enabled        else  ''}{batch_start.year}/"
+            if grain <= DATE_GRAIN["year"]
+            else ""
+        )
+        ret += (
+            f"{'month=' if partition_name_enabled       else  ''}{batch_start.month:02}/"
+            if grain <= DATE_GRAIN["month"]
+            else ""
+        )
+        ret += (
+            f"{'day=' if partition_name_enabled         else  ''}{batch_start.day:02}/"
+            if grain <= DATE_GRAIN["day"]
+            else ""
+        )
+        ret += (
+            f"{'hour=' if partition_name_enabled        else  ''}{batch_start.hour:02}/"
+            if grain <= DATE_GRAIN["hour"]
+            else ""
+        )
+        ret += (
+            f"{'minute=' if partition_name_enabled      else  ''}{batch_start.minute:02}/"
+            if grain <= DATE_GRAIN["minute"]
+            else ""
+        )
+        ret += (
+            f"{'second=' if partition_name_enabled      else  ''}{batch_start.second:02}/"
+            if grain <= DATE_GRAIN["second"]
+            else ""
+        )
+        ret += (
+            f"{'microsecond=' if partition_name_enabled else  ''}{batch_start.microsecond}/"
+            if grain <= DATE_GRAIN["microsecond"]
+            else ""
+        )
         return ret
 
     def create_file_structure(self, batch_start: datetime, grain: int) -> str:
@@ -144,7 +176,9 @@ def create_file_structure(self, batch_start: datetime, grain: int) -> str:
         ret += f"-{batch_start.hour:02}" if grain <= DATE_GRAIN["hour"] else ""
         ret += f"{batch_start.minute:02}" if grain <= DATE_GRAIN["minute"] else ""
         ret += f"{batch_start.second:02}" if grain <= DATE_GRAIN["second"] else ""
-        ret += f"{batch_start.microsecond}" if grain <= DATE_GRAIN["microsecond"] else ""
+        ret += (
+            f"{batch_start.microsecond}" if grain <= DATE_GRAIN["microsecond"] else ""
+        )
         return ret
 
     def flatten_key(self, k, parent_key, sep) -> str:
diff --git a/target_s3/target.py b/target_s3/target.py
index 6b6e2c1..99c08c4 100644
--- a/target_s3/target.py
+++ b/target_s3/target.py
@@ -1,6 +1,8 @@
 """s3 target class."""
 
 from __future__ import annotations
+import decimal
+import json
 
 from singer_sdk.target_base import Target
 from singer_sdk import typing as th
@@ -47,7 +49,7 @@ class Targets3(Target):
                                          resulting parquet file based on taps. Doesn't \
                                          work with 'anyOf' types or when complex data is\
                                          not defined at element level. Doesn't work with \
-                                         validate option for now."
+                                         validate option for now.",
                         ),
                     ),
                     required=False,