diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1477ea2..9501566 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -48,6 +48,9 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - name: Fix up git URLs
+        run: echo -e '[url "https://github.com/"]\n  insteadOf = "git://github.com/"' >> ~/.gitconfig
+
       - name: environment
         run: |
           echo "GITHUB_WORKSPACE=${GITHUB_WORKSPACE}"
@@ -58,7 +61,7 @@ jobs:
 
       - name: docker-compose install
         run: |
-          curl -L https://github.com/docker/compose/releases/download/1.11.2/docker-compose-`uname -s`-`uname -m` > ~/docker-compose
+          curl -L https://github.com/docker/compose/releases/download/1.29.2/docker-compose-`uname -s`-`uname -m` > ~/docker-compose
           chmod +x ~/docker-compose
           sudo mv ~/docker-compose /usr/local/bin/docker-compose
           docker-compose --version
diff --git a/Controller/LinksController.php b/Controller/LinksController.php
index e1c8e8c..72aa6e1 100644
--- a/Controller/LinksController.php
+++ b/Controller/LinksController.php
@@ -292,6 +292,9 @@ public function edit() {
 				$this->Link->alias . '.key' => $linkKey
 			)
 		));
+		if (empty($link)) {
+			return $this->throwBadRequest();
+		}
 
 		//編集権限チェック
 		if (! $this->Link->canEditWorkflowContent($link)) {