diff --git a/S/SummationByPartsOperators/Versions.toml b/S/SummationByPartsOperators/Versions.toml
index 5912f82f326a9c1..7044593e0227718 100644
--- a/S/SummationByPartsOperators/Versions.toml
+++ b/S/SummationByPartsOperators/Versions.toml
@@ -114,3 +114,6 @@ git-tree-sha1 = "1f734ba14e425702355d0c209830f64895d0e808"
 
 ["0.5.20"]
 git-tree-sha1 = "c0bb80d89f42a86380f82808c4d1ed7995cf8fd9"
+
+["0.5.21"]
+git-tree-sha1 = "ea86b2ce872958edde94c1af3348a12172dac6fe"