diff --git a/index.html b/index.html
index 95685cb..aa9039d 100644
--- a/index.html
+++ b/index.html
@@ -11,6 +11,10 @@
       rel="stylesheet"
     />
     <meta name="theme-color" content="#000000" />
+    <meta
+      http-equiv="Content-Security-Policy"
+      content="upgrade-insecure-requests"
+    />
     <meta
       name="description"
       content="해양 생물들을 촬영하여 나만의 도감을 채워나가는 체험형 교육 서비스, 물멍"