diff --git a/src/backend/requirements-dev.txt b/src/backend/requirements-dev.txt
index 126637a2cb..303e543d8f 100644
--- a/src/backend/requirements-dev.txt
+++ b/src/backend/requirements-dev.txt
@@ -421,9 +421,9 @@ django-types==0.22.0 \
     --hash=sha256:4cecc9eee846e7ff2a398bec9dfe6543e76efb922a7a58c5d6064bcb0e6a3dc5 \
     --hash=sha256:ba15c756c7a732e58afd0737e54489f1c5e6f1bd24132e9199c637b1f88b057c
     # via -r src/backend/requirements-dev.in
-filelock==3.20.0 \
-    --hash=sha256:339b4732ffda5cd79b13f4e2711a31b0365ce445d95d243bb996273d072546a2 \
-    --hash=sha256:711e943b4ec6be42e1d4e6690b48dc175c822967466bb31c0c293f34334c13f4
+filelock==3.20.1 \
+    --hash=sha256:15d9e9a67306188a44baa72f569d2bfd803076269365fdea0934385da4dc361a \
+    --hash=sha256:b8360948b351b80f420878d8516519a2204b07aefcdcfd24912a5d33127f188c
     # via virtualenv
 gprof2dot==2025.4.14 \
     --hash=sha256:0742e4c0b4409a5e8777e739388a11e1ed3750be86895655312ea7c20bd0090e \