diff --git a/cps/dep_check.py b/cps/dep_check.py
index 2f156913..1fee2adb 100644
--- a/cps/dep_check.py
+++ b/cps/dep_check.py
@@ -39,11 +39,16 @@ def load_dependencies(optional=False):
             with open(req_path, 'r') as f:
                 for line in f:
                     if not line.startswith('#') and not line == '\n' and not line.startswith('git'):
-                        res = re.match(r'(.*?)([<=>\s]+)([\d\.]+),?\s?([<=>\s]+)?([\d\.]+)?', line.strip())
+                        res = re.match(r'(.*?)([<=>\s]+)([\d\.]+),?\s?([<=>\s]+)?([\d\.]+)?'
+                                       r'(?:;python_version([<=>\s]+)\'([\d\.]+)\')?', line.strip())
                         try:
                             if getattr(sys, 'frozen', False):
                                 dep_version = exe_deps[res.group(1).lower().replace('_', '-')]
                             else:
+                                if res.group(6) and res.group(7):
+                                    if not eval(str(sys.version_info[0]) + "." + str(sys.version_info[1]) +
+                                                res.group(6)+ res.group(7)):
+                                        continue
                                 if importlib:
                                     dep_version = version(res.group(1))
                                 else:
diff --git a/pyproject.toml b/pyproject.toml
index 9ff8bb1f..43221289 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,8 @@ dependencies = [
     "Flask-Babel>=0.11.1,<4.1.0",
     "Flask-Principal>=0.3.2,<0.5.1",
     "Flask>=1.0.2,<3.1.0",
-    "iso-639>=0.4.5,<0.5.0",
+    "iso-639>=0.4.5,<0.5.0;python_version<'3.12'",
+    "pycountry>=20.0.0,<25.0.0;python_version>='3.12'",
     "PyPDF>=3.15.6,<5.1.0",
     "pytz>=2016.10",
     "requests>=2.32.0,<2.33.0",
diff --git a/requirements.txt b/requirements.txt
index 2e1a355a..bbe3b35b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,8 +3,8 @@ Babel>=1.3,<3.0
 Flask-Babel>=0.11.1,<4.1.0
 Flask-Principal>=0.3.2,<0.5.1
 Flask>=1.0.2,<3.1.0
-iso-639>=0.4.5,<0.5.0;python_version<"3.12"
-pycountry>=20.0.0,<25.0.0;python_version>="3.12"
+iso-639>=0.4.5<0.5.0;python_version<'3.12'
+pycountry>=20.0.0,<25.0.0;python_version>='3.12'
 PyPDF>=3.15.6,<5.1.0
 pytz>=2016.10
 requests>=2.32.0,<2.33.0