diff --git a/K/KiteViewers/Compat.toml b/K/KiteViewers/Compat.toml
index c843dbfa646483b..45a09907328239d 100644
--- a/K/KiteViewers/Compat.toml
+++ b/K/KiteViewers/Compat.toml
@@ -64,9 +64,13 @@ KiteUtils = "0.6-0.8"
 ["0.4.19"]
 KiteUtils = "0.8.2-0.8"
 
-["0.4.20-0"]
+["0.4.20"]
 KiteUtils = "0.9"
 
+["0.4.21-0"]
+KiteUtils = "0.9.1-0.9"
+StructArrays = "0.6.18-0.6"
+
 ["0.4.7"]
 KiteUtils = "0.6"
 
diff --git a/K/KiteViewers/Deps.toml b/K/KiteViewers/Deps.toml
index 927597e4332cac7..0f5eaad91b5e812 100644
--- a/K/KiteViewers/Deps.toml
+++ b/K/KiteViewers/Deps.toml
@@ -25,3 +25,6 @@ PrecompileTools = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
 
 ["0.4.13"]
 GLFW_jll = "0656b61e-2033-5cc2-a64a-77c0f6c09b89"
+
+["0.4.21-0"]
+StructArrays = "09ab397b-f2b6-538f-b94a-2f83cf4a842a"
diff --git a/K/KiteViewers/Versions.toml b/K/KiteViewers/Versions.toml
index 9eeaa3d5ce4a58c..0ad404572775c49 100644
--- a/K/KiteViewers/Versions.toml
+++ b/K/KiteViewers/Versions.toml
@@ -96,3 +96,6 @@ git-tree-sha1 = "a76d4017a77df5fd6ff3cf1ffa2eb2873816fb9d"
 
 ["0.4.20"]
 git-tree-sha1 = "464a9455ac25e1cb47d217e39aa40c05b3c90e9f"
+
+["0.4.21"]
+git-tree-sha1 = "35661a03f5ba27ff528c86cc49e2509c0ee22b7a"