diff --git a/agent/builder.py b/agent/builder.py
index dffd4c25..cf8d5e0f 100644
--- a/agent/builder.py
+++ b/agent/builder.py
@@ -361,7 +361,10 @@ def check_version(actual: str, expected: str) -> bool:
             actual += ".0"
 
         sv_actual = sv.Version(actual)
-        sv_expected = sv.SimpleSpec(expected)
+        try:
+            sv_expected = sv.SimpleSpec(expected)
+        except ValueError:
+            sv_expected = sv.NpmSpec(expected)
 
         return sv_actual in sv_expected
 
diff --git a/agent/tests/test_builder.py b/agent/tests/test_builder.py
new file mode 100644
index 00000000..1e278672
--- /dev/null
+++ b/agent/tests/test_builder.py
@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+import unittest
+
+
+class TestCheckVersion(unittest.TestCase):
+    def test_check_version(self):
+        from agent.builder import ValidationManager
+
+        cases = [
+            # python requires-python (SimpleSpec syntax)
+            ("3.11.0", ">=3.10", True),
+            ("3.9.0", ">=3.10", False),
+            ("3.11", ">=3.10,<3.13", True),
+            ("3.13", ">=3.10,<3.13", False),
+            # node engines (npm syntax)
+            ("18.16.0", ">=18", True),
+            ("16.20.0", ">=18", False),
+            ("18.16.0", "^18.0.0", True),
+            ("20.1.0", "^18.0.0", False),
+            ("18.16.0", ">=18 <21", True),
+            ("22.0.0", ">=18 <21", False),
+            ("18.16.0", "18.x", True),
+            ("20.0.0", "18.x", False),
+            ("20.0.0", "20 || 22", True),
+            ("21.0.0", "20 || 22", False),
+            ("18.16.0", "*", True),
+        ]
+
+        for actual, expected, want in cases:
+            with self.subTest(actual=actual, expected=expected):
+                self.assertEqual(ValidationManager.check_version(actual, expected), want)
diff --git a/requirements.txt b/requirements.txt
index 9f405e22..6a117553 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,4 +31,4 @@ mariadb-binlog-indexer==0.0.19
 mariadb-table-usage==0.0.3
 psutil==7.0.0
 tomli==2.4.1
-semantic-version==2.10.0
\ No newline at end of file
+semantic-version==2.10.0