diff --git a/Makefile b/Makefile
index 49721c778..85c332194 100644
--- a/Makefile
+++ b/Makefile
@@ -118,7 +118,7 @@ lint:
 .PHONY: install
 # Build and install everything
 install:
-	pnpm install
+	pnpm install --frozen-lockfile
 	pnpm run compile
 	make -C packages/taler-wallet-cli TOPLEVEL=yes install-nodeps
 	make -C packages/taler-harness TOPLEVEL=yes install-nodeps