diff --git a/eu.fl9.hamlocator.json b/eu.fl9.hamlocator.json
index c140771..9db5abb 100644
--- a/eu.fl9.hamlocator.json
+++ b/eu.fl9.hamlocator.json
@@ -1,7 +1,7 @@
 {
     "app-id" : "eu.fl9.hamlocator",
     "runtime" : "org.gnome.Platform",
-    "runtime-version" : "master",
+    "runtime-version" : "42",
     "sdk" : "org.gnome.Sdk",
     "command" : "hamlocator",
     "finish-args" : [