diff --git a/capa/features/extractors/elf.py b/capa/features/extractors/elf.py
index 9008d3e9..24a48e60 100644
--- a/capa/features/extractors/elf.py
+++ b/capa/features/extractors/elf.py
@@ -106,7 +106,6 @@ class Shdr:
         )
 
 
-
 class ELF:
     def __init__(self, f: BinaryIO):
         self.f = f
@@ -720,7 +719,9 @@ class SymTab:
             if section.sh_info & SHT_SYMTAB:
                 strtab_section = ElfBinary.sections[section.sh_link]
                 sh_symtab = Shdr.from_viv(section, ElfBinary.readAtOffset(section.sh_offset, section.sh_size))
-                sh_strtab = Shdr.from_viv(strtab_section, ElfBinary.readAtOffset(strtab_section.sh_offset, strtab_section.sh_size))
+                sh_strtab = Shdr.from_viv(
+                    strtab_section, ElfBinary.readAtOffset(strtab_section.sh_offset, strtab_section.sh_size)
+                )
 
         try:
             return cls(endian, bitness, sh_symtab, sh_strtab)
diff --git a/capa/features/extractors/viv/extractor.py b/capa/features/extractors/viv/extractor.py
index c73b24a2..25e4b0de 100644
--- a/capa/features/extractors/viv/extractor.py
+++ b/capa/features/extractors/viv/extractor.py
@@ -51,7 +51,9 @@ class VivisectFeatureExtractor(FeatureExtractor):
     def get_functions(self) -> Iterator[FunctionHandle]:
         cache = {}
         for va in sorted(self.vw.getFunctions()):
-            yield FunctionHandle(address=AbsoluteVirtualAddress(va), inner=viv_utils.Function(self.vw, va), ctx={"cache":cache})
+            yield FunctionHandle(
+                address=AbsoluteVirtualAddress(va), inner=viv_utils.Function(self.vw, va), ctx={"cache": cache}
+            )
 
     def extract_function_features(self, fh: FunctionHandle) -> Iterator[Tuple[Feature, Address]]:
         yield from capa.features.extractors.viv.function.extract_features(fh)