diff --git a/image/Makefile b/image/Makefile
index 2a8ff299e..29ef3ce80 100644
--- a/image/Makefile
+++ b/image/Makefile
@@ -25,12 +25,12 @@ $(csps): %: mkosi.output.%/fedora~37/image.raw
 prebuilt/azure/rpms/%.rpm:
 	@echo "Downloading $*"
 	@mkdir -p $(@D)
-	@curl -sL -o $@ https://cdn.confidential.cloud/constellation/testing/kernel/3/$*.rpm
+	@curl -sL -o $@ "https://cdn.confidential.cloud/constellation/testing/kernel/4/$*.rpm"
 
 prebuilt/gcp/rpms/%.rpm:
 	@echo "Downloading $*"
 	@mkdir -p $(@D)
-	@curl -sL -o $@ https://kojipkgs.fedoraproject.org/packages/kernel/5.19.17/300.fc37/x86_64/$*.rpm
+	@curl -sL -o $@ "https://kojipkgs.fedoraproject.org/packages/kernel/5.19.17/300.fc37/x86_64/$*.rpm"
 
 mkosi.output.%/fedora~37/image.raw: mkosi.files/mkosi.%.conf inject-bins inject-certs
 	mkosi --config mkosi.files/mkosi.$*.conf --image-version=$(IMAGE_VERSION) build