diff --git a/app/__init__.py b/app/__init__.py
index 6aa695e..ac37e32 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -22,6 +22,7 @@
         "'sha256-+6WnXIl4mbFTCARd8N3COQmT3bJJmo32N8q8ZSQAIcU='",
         "'sha256-l1eTVSK8DTnK8+yloud7wZUqFrI0atVo6VlC6PJvYaQ='",
     ],
+    "img-src": ["data:", "'self'"],
 }
 
 Compress(app)