diff --git a/theodolite-benchmarks/docker-test/uc1-beam-samza/docker-compose.yml b/theodolite-benchmarks/docker-test/uc1-beam-samza/docker-compose.yml
index 88cc156cee3b09a4f9706c86638085109fc17681..40a05a8d1716fb5fe122584cf4633fa36c70ceda 100644
--- a/theodolite-benchmarks/docker-test/uc1-beam-samza/docker-compose.yml
+++ b/theodolite-benchmarks/docker-test/uc1-beam-samza/docker-compose.yml
@@ -37,6 +37,7 @@ services:
       - schema-registry
       - kafka
     environment:
+      MAX_SOURCE_PARALLELISM: 1
       KAFKA_BOOTSTRAP_SERVERS: kafka:9092
       SCHEMA_REGISTRY_URL: http://schema-registry:8081
   load-generator: 
diff --git a/theodolite-benchmarks/docker-test/uc2-beam-samza/docker-compose.yml b/theodolite-benchmarks/docker-test/uc2-beam-samza/docker-compose.yml
index 99cd185a8efa4efcc99ac217b10c40084ea29f5e..a9426b90771adc275fad3ad7c0ba0f465e41ad3b 100644
--- a/theodolite-benchmarks/docker-test/uc2-beam-samza/docker-compose.yml
+++ b/theodolite-benchmarks/docker-test/uc2-beam-samza/docker-compose.yml
@@ -37,6 +37,7 @@ services:
       - schema-registry
       - kafka
     environment:
+      MAX_SOURCE_PARALLELISM: 1
       KAFKA_BOOTSTRAP_SERVERS: kafka:9092
       SCHEMA_REGISTRY_URL: http://schema-registry:8081
       KAFKA_WINDOW_DURATION_MINUTES: 60
diff --git a/theodolite-benchmarks/docker-test/uc3-beam-samza/docker-compose.yml b/theodolite-benchmarks/docker-test/uc3-beam-samza/docker-compose.yml
index c8fd55e91867bc974d802a37ef0d9604de734c0a..c5a55077e9f8b6b7e483bf15250cab9561c617da 100644
--- a/theodolite-benchmarks/docker-test/uc3-beam-samza/docker-compose.yml
+++ b/theodolite-benchmarks/docker-test/uc3-beam-samza/docker-compose.yml
@@ -37,6 +37,7 @@ services:
       - schema-registry
       - kafka
     environment:
+      MAX_SOURCE_PARALLELISM: 1
       KAFKA_BOOTSTRAP_SERVERS: kafka:9092
       SCHEMA_REGISTRY_URL: http://schema-registry:8081
   load-generator: 
diff --git a/theodolite-benchmarks/docker-test/uc4-beam-samza/docker-compose.yml b/theodolite-benchmarks/docker-test/uc4-beam-samza/docker-compose.yml
index 806099af1f7ddf2fb307ccb40378123e35acbece..ac4ab9539405f854a3c935dafaafae309086349a 100644
--- a/theodolite-benchmarks/docker-test/uc4-beam-samza/docker-compose.yml
+++ b/theodolite-benchmarks/docker-test/uc4-beam-samza/docker-compose.yml
@@ -37,6 +37,7 @@ services:
       - schema-registry
       - kafka
     environment:
+      MAX_SOURCE_PARALLELISM: 1
       KAFKA_BOOTSTRAP_SERVERS: kafka:9092
       SCHEMA_REGISTRY_URL: http://schema-registry:8081
   load-generator: