diff --git a/requirements.dev.txt b/requirements.dev.txt
index 0b07b20..71e68f8 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -455,9 +455,9 @@ editorconfig==0.12.4 \
     # via
     #   dragonlib (pyproject.toml)
     #   manageprojects
-filelock==3.16.1 \
-    --hash=sha256:2082e5703d51fbf98ea75855d9d5527e33d8ff23099bec374a134febee6946b0 \
-    --hash=sha256:c249fbfcd5db47e5e2d6d62198e565475ee65e4831e2561c8e313fa7eb961435
+filelock==3.20.1 \
+    --hash=sha256:15d9e9a67306188a44baa72f569d2bfd803076269365fdea0934385da4dc361a \
+    --hash=sha256:b8360948b351b80f420878d8516519a2204b07aefcdcfd24912a5d33127f188c
     # via
     #   cachecontrol
     #   tox