diff --git a/requirements.lock.txt b/requirements.lock.txt
index 653b9636..ffce181e 100644
--- a/requirements.lock.txt
+++ b/requirements.lock.txt
@@ -179,9 +179,9 @@ dill==0.3.8 \
     # via
     #   -r requirements.txt
     #   pylint
-distlib==0.3.8 \
-    --hash=sha256:034db59a0b96f8ca18035f36290806a9a6e6bd9d1ff91e45a7f172eb17e51784 \
-    --hash=sha256:1530ea13e350031b6312d8580ddb6b27a104275a31106523b8f123787f494f64
+distlib==0.3.9 \
+    --hash=sha256:47f8c22fd27c27e25a65601af709b38e4f0a45ea4fc2e710f65755fa8caaaf87 \
+    --hash=sha256:a60f20dea646b8a33f3e7772f74dc0b2d0772d2837ee1342a00645c81edf9403
     # via
     #   -r requirements.txt
     #   virtualenv