diff --git a/Formula/pijul.rb b/Formula/pijul.rb
index 5f33b45028f87..aa33b75dd6aaf 100644
--- a/Formula/pijul.rb
+++ b/Formula/pijul.rb
@@ -24,7 +24,7 @@ def install
     ENV["OPENSSL_DIR"] = Formula["openssl@1.1"].opt_prefix
 
     cd "pijul" do
-      system "cargo", "install", "--root", prefix, "--path", "."
+      system "cargo", "install", "--locked", "--root", prefix, "--path", "."
     end
   end