diff --git a/.builds/debian-stable.yml b/.builds/debian-stable.yml
index 4be2ea4f3ff0da460464806a6a7ce4a566f7d276..859600eea9413f7b6f6c8d085b2503cd7df9b3c7 100644
--- a/.builds/debian-stable.yml
+++ b/.builds/debian-stable.yml
@@ -20,3 +20,7 @@ tasks:
 - test: |
     cd sgx-jmp
     RANTLY_COUNT=100 bundle exec rake test
+- check_config_sample: |
+    curl -LO https://github.com/dhall-lang/dhall-haskell/releases/download/1.39.0/dhall-1.39.0-x86_64-linux.tar.bz2
+    tar -xf dhall-*.tar.bz2
+    bin/dhall --plain < sgx-jmp/config.dhall.sample
diff --git a/config.dhall.sample b/config.dhall.sample
index 033a982bb9442d503f5adc3ecb42a75448d0254e..1bfcc17c49130a018b762de6054518d3bee23425 100644
--- a/config.dhall.sample
+++ b/config.dhall.sample
@@ -36,10 +36,10 @@
 			CAD = ""
 		}
 	},
-	xep0157 = {
+	xep0157 = [
 		{ var = "support-addresses", value = "xmpp:+14169938000@cheogram.com" }
-	},
-	plans = ./plans.dhall
+	],
+	plans = ./plans.dhall,
 	electrum = ./electrum.dhall,
 	oxr_app_id = "",
 	activation_amount = 15,