diff --git a/build.gradle.kts b/build.gradle.kts
index cae78ad..64178a0 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -33,7 +33,7 @@ repositories {
 
 dependencies {
     // Paper
-    paperweight.paperDevBundle("1.21.8-R0.1-SNAPSHOT")
+    paperweight.paperDevBundle("1.21.10-R0.1-SNAPSHOT")
 
     // Gui library
     val inventoryFramework = "xyz.alexcrea.cuanvil.inventoryframework:IF-CustomAnvil:0.10.18.2"
diff --git a/src/main/kotlin/xyz/alexcrea/cuanvil/dependency/gui/GuiTesterSelector.kt b/src/main/kotlin/xyz/alexcrea/cuanvil/dependency/gui/GuiTesterSelector.kt
index 0f18e44..6feb7fb 100644
--- a/src/main/kotlin/xyz/alexcrea/cuanvil/dependency/gui/GuiTesterSelector.kt
+++ b/src/main/kotlin/xyz/alexcrea/cuanvil/dependency/gui/GuiTesterSelector.kt
@@ -12,6 +12,7 @@ object GuiTesterSelector {
             return when (versionParts[1]) {
                 21 -> when (versionParts[2]) {
                     8 -> "1_21_R5"
+                    9, 10 -> "1_21_R6"
                     else -> null
                 }