diff --git a/config/version.cue b/config/version.cue
index 4368d0a..f085953 100644
--- a/config/version.cue
+++ b/config/version.cue
@@ -1,6 +1,10 @@
 import "strings"
 import "list"
 
+#PlatformVersion: {
+	version!: int
+}
+
 #MinorVersion: {
 	version!: =~ "^\\d+.\\d+$"
 }
@@ -9,6 +13,7 @@ import "list"
 	version!: =~ "^\\d+.\\d+.\\d+$"
 }
 
+
 #MinorOrPatchVersion: #MinorVersion | #PatchVersion
 
 flutter: {
@@ -18,7 +23,7 @@ flutter: {
 }
 
 android: {
-	platforms!: [ { version!: int } ] & list.MinItems(1)
+	platforms!: [...#PlatformVersion] & list.MinItems(1) & list.UniqueItems
 	gradle!: #MinorOrPatchVersion
 	buildTools!: #PatchVersion
 	cmdlineTools!: #MinorVersion