diff --git a/docker-compose.yml b/docker-compose.yml
index d4a02c3..6868fac 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -99,9 +99,9 @@ services:
         delay: 5s
         max_attempts: 5
         window: 10s
-        placement:
-          constraints:
-            - node.labels.mongo.role==data2
+      placement:
+        constraints:
+          - node.labels.mongo.role==data2
 
   mongo-shard-1:
     image: mongo
@@ -113,9 +113,9 @@ services:
         delay: 5s
         max_attempts: 5
         window: 10s
-        placement:
-          constraints:
-            - node.labels.mongo.role==data1
+      placement:
+        constraints:
+          - node.labels.mongo.role==data1
 
   mongo-shard-2:
     image: mongo
@@ -127,9 +127,9 @@ services:
         delay: 5s
         max_attempts: 5
         window: 10s
-        placement:
-          constraints:
-            - node.labels.mongo.role==data2
+      placement:
+        constraints:
+          - node.labels.mongo.role==data2
 
   mongo-express:
     image: mongo-express
diff --git a/mongo-supervisor/src/main/kotlin/edu/unito/maadb/mongosupervisor/Utils.kt b/mongo-supervisor/src/main/kotlin/edu/unito/maadb/mongosupervisor/Utils.kt
index c457779..fce9b2f 100644
--- a/mongo-supervisor/src/main/kotlin/edu/unito/maadb/mongosupervisor/Utils.kt
+++ b/mongo-supervisor/src/main/kotlin/edu/unito/maadb/mongosupervisor/Utils.kt
@@ -43,7 +43,7 @@ suspend fun mongoEval(host: String, port: Int, command: String) = withContext(Di
     with(ProcessBuilder("mongo", "--host", host, "--port", port.toString(), "--eval", command)) {
         val output = createTempFile()
         redirectOutput(output)
-        val exitValue = start().exitValue()
+        val exitValue = start().waitFor()
         println("Process output:")
         output.readLines()
             .map { "\t $it" }