diff --git a/legacy_api_wrap.py b/legacy_api_wrap.py
index 3e71619..dd734b2 100644
--- a/legacy_api_wrap.py
+++ b/legacy_api_wrap.py
@@ -1,4 +1,3 @@
-# coding: future-fstrings
 """
 Legacy API wrapper.
 
diff --git a/pyproject.toml b/pyproject.toml
index 1098af9..1f7ff6a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ['flit>=1.3', 'future-fstrings']
+requires = ['flit>=1.3']
 build-backend = 'flit.buildapi'
 
 [tool.flit.metadata]
@@ -9,11 +9,10 @@ description-file = 'README.rst'
 author = 'Philipp A.'
 author-email = 'flying-sheep@web.de'
 home-page = 'https://github.com/flying-sheep/legacy-api-wrap'
-requires-python = '>=3.5'
+requires-python = '>=3.6'
 requires = [
     'get-version >=2.0.4',
     'setuptools',
-    'future-fstrings',
 ]
 classifiers = [
     'Development Status :: 5 - Production/Stable',