diff --git a/pyproject.toml b/pyproject.toml
index c86a8cb6..ea3f1a8e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ name = "aiXplain"
 version = "0.2.35rc1"
 description = "aiXplain SDK adds AI functions to software."
 readme = "README.md"
-requires-python = ">=3.9, <4"
+requires-python = ">=3.5, <4"
 license = { text = "Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0" }
 authors = [
   {email = "ahmet@aixplain.com"},
@@ -30,6 +30,10 @@ classifiers = [
     "Operating System :: OS Independent",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.5",
+    "Programming Language :: Python :: 3.6",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",