diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index c47a0126e7..2e9087bb55 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -36,6 +36,10 @@ v35.0.0 (2025-06-23)
 - Add "Package Compliance Alert" chart in the Policies section.
   https://github.com/aboutcode-org/scancode.io/pull/1699
 
+- Catch ``NotImplementedError`` in ``get_unique_unresolved_purls`` and properly
+  log error in project.
+  https://github.com/aboutcode-org/scancode.io/pull/1700
+
 v34.11.0 (2025-05-02)
 ---------------------
 
diff --git a/scanpipe/pipes/purldb.py b/scanpipe/pipes/purldb.py
index 98224728f9..fd35b3c147 100644
--- a/scanpipe/pipes/purldb.py
+++ b/scanpipe/pipes/purldb.py
@@ -318,8 +318,12 @@ def get_unique_unresolved_purls(project):
 
             try:
                 vers = range_class.from_native(extracted_requirement)
-            except (InvalidVersionRange, InvalidVersion) as exception:
-                if exception is InvalidVersionRange:
+            except (
+                InvalidVersionRange,
+                InvalidVersion,
+                NotImplementedError,
+            ) as exception:
+                if exception in (InvalidVersionRange, NotImplementedError):
                     description = "Version range is invalid or unsupported"
                 else:
                     description = "Extracted requirement is not a valid version"