diff --git a/docs.tuleap.org/Dockerfile b/docs.tuleap.org/Dockerfile
index 3f161601..09f7047e 100644
--- a/docs.tuleap.org/Dockerfile
+++ b/docs.tuleap.org/Dockerfile
@@ -1,4 +1,4 @@
-FROM nixos/nix:2.21.1@sha256:3f6c77ee4d2c82e472e64e6cd7087241dc391421a0b42c22e6849c586d5398d9 AS builder
+FROM nixos/nix:2.22.0@sha256:d832e9b78fe119bdbe86549ab53557b27c837f3f02d1addc885ba294d143769b AS builder
 
 COPY --chown=1000:1000 . /home/builder/tuleap-documentation