diff --git a/backend/classifier/requirements.txt b/backend/classifier/requirements.txt
index 6198b06..5e30579 100644
--- a/backend/classifier/requirements.txt
+++ b/backend/classifier/requirements.txt
@@ -13,4 +13,8 @@ tldextract>=3.4.0
 # spaCy small English model (installable via pip from GitHub release)
 https://github.com/explosion/spacy-models/releases/download/en_core_web_sm-3.7.0/en_core_web_sm-3.7.0.tar.gz#egg=en_core_web_sm
 # Test tooling
-pytest>=7.0.0
\ No newline at end of file
+pytest>=7.0.0
+filelock>=3.20.1 # not directly required, pinned by Snyk to avoid a vulnerability
+requests>=2.32.4 # not directly required, pinned by Snyk to avoid a vulnerability
+urllib3>=2.6.0 # not directly required, pinned by Snyk to avoid a vulnerability
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file