diff --git a/signac/contrib/indexing.py b/signac/contrib/indexing.py
index 0ca4b83e1..e2c70e812 100644
--- a/signac/contrib/indexing.py
+++ b/signac/contrib/indexing.py
@@ -620,7 +620,7 @@ def __init__(self, *args, **kwargs):
         warnings.warn(
             "The MasterCrawler class has been replaced by the MainCrawler class. "
             "Both classes are deprecated and will be removed in a future release.",
-            DeprecationWarning,
+            FutureWarning,
         )
         super().__init__(*args, **kwargs)