diff --git a/internal/webserver/response_helpers.go b/internal/webserver/response_helpers.go
index f790815..2c0b2a2 100644
--- a/internal/webserver/response_helpers.go
+++ b/internal/webserver/response_helpers.go
@@ -246,12 +246,16 @@ func cursor_to_query_params(c persistence.Cursor) string {
 	return result.Encode()
 }
 
+type key string
+
+const TWEET_KEY = key("tweet")
+
 func add_tweet_to_context(ctx context.Context, tweet scraper.Tweet) context.Context {
-	return context.WithValue(ctx, "tweet", tweet)
+	return context.WithValue(ctx, TWEET_KEY, tweet)
 }
 
 func get_tweet_from_context(ctx context.Context) scraper.Tweet {
-	tweet, is_ok := ctx.Value("tweet").(scraper.Tweet)
+	tweet, is_ok := ctx.Value(TWEET_KEY).(scraper.Tweet)
 	if !is_ok {
 		panic("Tweet not found in context")
 	}