diff --git a/extensions/tests/test_manifest.py b/extensions/tests/test_manifest.py
index e3bd23e4..33715835 100644
--- a/extensions/tests/test_manifest.py
+++ b/extensions/tests/test_manifest.py
@@ -400,11 +400,8 @@ class ValidateManifestFields(TestCase):
         data['blender_version_min'] = '2.9'
         with self.assertRaises(ValidationError) as e:
             ManifestValidator(data)
-
         self.assertEqual(1, len(e.exception.messages))
-
         self.assertIn('blender_version_min', e.exception.messages[0])
-        self.assertIn('4.2.0', e.exception.messages[0])
 
         data['blender_version_min'] = '4.1.0'
         with self.assertRaises(ValidationError) as e:
@@ -419,12 +416,8 @@ class ValidateManifestFields(TestCase):
         data['blender_version_min'] = '4.2.0-beta'
         with self.assertRaises(ValidationError) as e:
             ManifestValidator(data)
-        self.assertEqual(
-            e.exception.messages,
-            [
-                'Manifest value error: <code>blender_version_min</code> should be at least "4.2.0"',
-            ],
-        )
+        self.assertIn('blender_version_min', e.exception.messages[0])
+        self.assertIn('should follow', e.exception.messages[0])
 
     def test_blender_version_max(self):
         data = {
@@ -443,6 +436,52 @@ class ValidateManifestFields(TestCase):
             self.assertEqual(1, len(e.exception.messages))
             self.assertIn('blender_version_max', e.exception.messages[0])
 
+    def test_non_semver_versions(self):
+        data = {
+            **self.mandatory_fields,
+            **self.optional_fields,
+        }
+
+        for field, value in (
+            ('blender_version_min', '4.2'),
+            ('blender_version_min', '4.2.1+alpha'),
+            ('blender_version_min', '5'),
+            ('blender_version_max', '4.3'),
+            ('blender_version_max', '4.3.0+alpha'),
+            ('blender_version_max', '5'),
+            ('schema_version', '1.0'),
+            ('schema_version', '1'),
+            ('schema_version', '1.0.0.0'),
+        ):
+            value_original = data[field]
+            data[field] = value
+
+            with self.assertRaises(ValidationError) as e:
+                ManifestValidator(data)
+            self.assertEqual(1, len(e.exception.messages))
+            self.assertIn(field, e.exception.messages[0])
+
+            data[field] = value_original
+
+    def test_version(self):
+        data = {
+            **self.mandatory_fields,
+            **self.optional_fields,
+        }
+
+        data['version'] = '1.2.0'
+        ManifestValidator(data)
+
+        data['version'] = '1.2.0+alpha'
+        ManifestValidator(data)
+
+        for bad_version in ['1.2', '1.2.0.0', '1']:
+            data['version'] = bad_version
+            with self.assertRaises(ValidationError) as e:
+                ManifestValidator(data)
+            self.assertEqual(1, len(e.exception.messages))
+            self.assertIn('version', e.exception.messages[0])
+
     def test_licenses(self):
         data = {
             **self.mandatory_fields,
diff --git a/files/validators.py b/files/validators.py
index 73056ce3..d1431aff 100644
--- a/files/validators.py
+++ b/files/validators.py
@@ -1,5 +1,6 @@
 from semantic_version import Version
 import logging
+import re
 
 from django.core.exceptions import ValidationError
 from django.core.validators import URLValidator, validate_unicode_slug
@@ -20,6 +21,10 @@ import files.models
 
 logger = logging.getLogger(__name__)
 
+# Define the regex pattern for major.minor.patch (do not include any additional label).
+# https://semver.org/#is-there-a-suggested-regular-expression-regex-to-check-a-semver-string
+version_regex_pattern = re.compile(r'^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$')
+
 
 @deconstructible
 class FileMIMETypeValidator:
@@ -536,7 +541,35 @@ class VersionValidator:
             )
 
 
-class SchemaVersionValidator(VersionValidator):
+class SemVerNoLabelValidator(StringValidator):
+    """These version are a sub-set of the semantic version
+
+    They  only support major.minor.patch.
+    """
+
+    @staticmethod
+    def is_version_string(version):
+        return version_regex_pattern.match(version)
+
+    @classmethod
+    def validate(cls, *, name: str, value: str, manifest: dict) -> str:
+        """Return error message if cannot validate, otherwise returns nothing"""
+        err_message = mark_safe(
+            f'Manifest value error: <code>{name}</code> should follow a '
+            f'<a href="https://semver.org/" target="_blank">semantic version</a> '
+            f'with only major.minor.patch '
+            f'e.g., "{cls.example}"'
+        )
+
+        if super().validate(name=name, value=value, manifest=manifest):
+            return err_message
+
+        # Make sure we only have major.minor.patch.
+        if not cls.is_version_string(version=value):
+            return err_message
+
+
+class SchemaVersionValidator(SemVerNoLabelValidator):
     example = '1.0.0'
 
     @classmethod
@@ -558,7 +591,7 @@ class SchemaVersionValidator(VersionValidator):
             )
 
 
-class VersionMinValidator(VersionValidator):
+class VersionMinValidator(SemVerNoLabelValidator):
     example = '4.2.0'
 
     @classmethod
@@ -574,7 +607,7 @@ class VersionMinValidator(VersionValidator):
             )
 
 
-class VersionMaxValidator(VersionValidator):
+class VersionMaxValidator(SemVerNoLabelValidator):
     example = '4.3.0'
 
     @classmethod
@@ -591,15 +624,7 @@ class VersionMaxValidator(VersionValidator):
             # assuming that VersionMinValidator has caught this and reported properly
             return
 
-        try:
-            max = Version(value)
-        except (ValueError, TypeError):
-            return mark_safe(
-                f'Manifest value error: <code>{name}</code> should follow a '
-                f'<a href="https://semver.org/" target="_blank">semantic version</a>. '
-                f'e.g., "{cls.example}"'
-            )
-
+        max = Version(value)
         if max <= min:
             return mark_safe(
                 'Manifest value error: <code>blender_version_max</code> should be greater than '