diff --git a/src/execute/julia.ts b/src/execute/julia.ts
index a852b6e6e0..6a795ff88a 100644
--- a/src/execute/julia.ts
+++ b/src/execute/julia.ts
@@ -397,7 +397,9 @@ async function ensureQuartoNotebookRunnerEnvironment(
 ) {
   const projectTomlTemplate = juliaResourcePath("Project.toml");
   const projectToml = join(juliaRuntimeDir(), "Project.toml");
-  Deno.writeFileSync(projectToml, Deno.readFileSync(projectTomlTemplate));
+  Deno.writeFileSync(projectToml, Deno.readFileSync(projectTomlTemplate), {
+    mode: 0o644  // rw-r--r--
+  });
   const command = new Deno.Command(juliaCmd(), {
     args: [
       "--startup-file=no",