diff --git a/superset/config.py b/superset/config.py
index afe41fe5949e..eec3abe81c74 100644
--- a/superset/config.py
+++ b/superset/config.py
@@ -1418,7 +1418,7 @@ def EMAIL_HEADER_MUTATOR(  # pylint: disable=invalid-name,unused-argument
 TALISMAN_CONFIG = {
     "content_security_policy": {
         "default-src": ["'self'"],
-        "img-src": ["'self'", "data:"],
+        "img-src": ["'self'", "blob:", "data:"],
         "worker-src": ["'self'", "blob:"],
         "connect-src": [
             "'self'",
@@ -1440,7 +1440,7 @@ def EMAIL_HEADER_MUTATOR(  # pylint: disable=invalid-name,unused-argument
 TALISMAN_DEV_CONFIG = {
     "content_security_policy": {
         "default-src": ["'self'"],
-        "img-src": ["'self'", "data:"],
+        "img-src": ["'self'", "blob:", "data:"],
         "worker-src": ["'self'", "blob:"],
         "connect-src": [
             "'self'",