diff --git a/makefile_web b/makefile_web
index 73dddafb..a99be0cc 100644
--- a/makefile_web
+++ b/makefile_web
@@ -16,7 +16,7 @@ tarball: boids_web_root.tar
 boids_web_root.tar: out/boids.js out/boids_bg.wasm out/index.html
 	tar -caf $@ $<
 
-target/$(CARGO_TARGET)/$(CARGO_PROFILE)/another-boids-in-rust.wasm: $(SRCS)
+target/$(CARGO_TARGET)/$(CARGO_PROFILE)/another-boids-in-rust.wasm: $(SRCS) Cargo.lock Cargo.toml
 	cargo build --profile $(CARGO_PROFILE) --target $(CARGO_TARGET)
 
 out: