diff --git a/pyproject.toml b/pyproject.toml
index c499d15..2e73405 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ maintainers = [
 license = {file = "LICENSE.txt"}
 readme = "README.rst"
 keywords = ["Amplicon", "sequencing", "fungal", "ITS"]
-requires-python = ">=3.8"
+requires-python = ">=3.7"
 
 dependencies = [
     "biopython >=1.79",
@@ -26,8 +26,8 @@ dependencies = [
 
 classifiers = [
     "Topic :: Scientific/Engineering :: Bio-Informatics",
-    "Programming Language :: Python :: 3.6",
-    "Programming Language :: Python :: 3.5",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
     "Development Status :: 7 - Inactive"
 ]