diff --git a/bucket/cosign.json b/bucket/cosign.json
index 939bee5506..ee13bb71ef 100644
--- a/bucket/cosign.json
+++ b/bucket/cosign.json
@@ -19,7 +19,7 @@
         },
         "hash": {
             "url": "$baseurl/cosign_checksums.txt",
-            "regex": "$sha256\\s+$basename[^_]"
+            "regex": "(?im)^$sha256\\s+$basename$"
         }
     }
 }
diff --git a/bucket/sget.json b/bucket/sget.json
index 17d66d25d3..afac88d01b 100644
--- a/bucket/sget.json
+++ b/bucket/sget.json
@@ -19,7 +19,7 @@
         },
         "hash": {
             "url": "$baseurl/cosign_checksums.txt",
-            "regex": "$sha256\\s+$basename[^_]"
+            "regex": "(?im)^$sha256\\s+$basename$"
         }
     }
 }