diff --git a/paperweight-userdev/src/main/kotlin/io/papermc/paperweight/userdev/internal/setup/DevBundles.kt b/paperweight-userdev/src/main/kotlin/io/papermc/paperweight/userdev/internal/setup/DevBundles.kt
index afb1779d..10ce56e7 100644
--- a/paperweight-userdev/src/main/kotlin/io/papermc/paperweight/userdev/internal/setup/DevBundles.kt
+++ b/paperweight-userdev/src/main/kotlin/io/papermc/paperweight/userdev/internal/setup/DevBundles.kt
@@ -58,7 +58,7 @@ private fun readDevBundle(
     if (dataVersion !in supported) {
         throw PaperweightException(
             "The paperweight development bundle you are attempting to use is of data version '$dataVersion', but" +
-                " the currently running version of paperweight only supports data versions '$supported'."
+                " the currently running version of paperweight only supports data versions '${supported.keys}'."
         )
     }