diff --git a/.devcontainer/experimental/Dockerfile b/.devcontainer/experimental/Dockerfile
index c32db6210..bafe5725d 100644
--- a/.devcontainer/experimental/Dockerfile
+++ b/.devcontainer/experimental/Dockerfile
@@ -1,4 +1,4 @@
-FROM openinf/grimesai-salvage-tex:lunar
+FROM openinf/grimesai-salvage-tex:lunar@sha256:85db277df2bb6b07922478085cd612a67a9a7d3923b09135a7f6bd9bd65ca89a
 
 ARG USERNAME=vscode
 ARG NPM_GLOBAL=/usr/local/share/npm-global