diff --git a/releasechecker.go b/releasechecker.go
index f62f746..d455df2 100644
--- a/releasechecker.go
+++ b/releasechecker.go
@@ -98,7 +98,9 @@ func (c *Checker) query(owner, name string) (Repository, error) {
 		"name":  githubql.String(name),
 	}
 
-	if err := c.client.Query(context.Background(), &query, variables); err != nil {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	if err := c.client.Query(ctx, &query, variables); err != nil {
 		return Repository{}, err
 	}
 
diff --git a/slack.go b/slack.go
index af1ab13..41cd842 100644
--- a/slack.go
+++ b/slack.go
@@ -45,7 +45,7 @@ func (s *SlackSender) Send(repository Repository) error {
 	if err != nil {
 		return err
 	}
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	req = req.WithContext(ctx)
 	defer cancel()