diff --git a/README.md b/README.md
index 68a667e95924547abe048f850a158c8118777cfc..8567ffff81ed12f817e4e4d5f57301b837ad15a3 100644
--- a/README.md
+++ b/README.md
@@ -139,7 +139,7 @@ bash tests/test_integration_workflow_with_conda/test.slurm.sh
 
 > **NOTE:** Depending on the configuration of your Slurm installation or if
 > using a different workload manager, you may need to adapt file `cluster.json`
-> and the arguments to options `--config` and `--cores` in the file
+> and the arguments to options `--config`, `--cores` and `--jobs` in the file
 > `test.slurm.sh`, both located in directory `tests/test_integration_workflow`.
 > Consult the manual of your workload manager as well as the section of the
 > Snakemake manual dealing with [cluster execution].
@@ -210,6 +210,7 @@ your run.
         --cluster-config="cluster.json" \
         --cluster="sbatch --cpus-per-task={cluster.threads} --mem={cluster.mem} --qos={cluster.queue} --time={cluster.time} --job-name={cluster.name} -o {cluster.out} -p scicore" \
         --cores=256 \
+        --jobs=256 \
         --printshellcmds \
         --rerun-incomplete \
         --use-singularity \
diff --git a/install/environment.yml b/install/environment.yml
index 8fcba7a48080b33b67fbb45454e1a52aacf3783a..e28326d0faaf643a0f78d80910990b9fa5f373d4 100644
--- a/install/environment.yml
+++ b/install/environment.yml
@@ -12,5 +12,4 @@ dependencies:
   - python=3.7.4
   - pip:
     - pandas==1.0.1
-    - snakemake==5.19.2
-
+    - snakemake==6.5.5
\ No newline at end of file
diff --git a/tests/test_integration_workflow/test.slurm.sh b/tests/test_integration_workflow/test.slurm.sh
index 6c40abba6ba761899bd224c3a87a8f02ebf0df3c..22f2f5231c8ce9942a42990d11146139e87b3818 100755
--- a/tests/test_integration_workflow/test.slurm.sh
+++ b/tests/test_integration_workflow/test.slurm.sh
@@ -31,6 +31,7 @@ snakemake \
     --cluster-config="../input_files/cluster.json" \
     --cluster="sbatch --cpus-per-task={cluster.threads} --mem={cluster.mem} --qos={cluster.queue} --time={cluster.time} --job-name={cluster.name} -o {cluster.out} -p scicore" \
     --cores=256 \
+    --jobs=256 \
     --printshellcmds \
     --rerun-incomplete \
     --use-singularity \
diff --git a/tests/test_integration_workflow_multiple_lanes/test.slurm.sh b/tests/test_integration_workflow_multiple_lanes/test.slurm.sh
index 10a2752b9531e36c2d23d07ba1950b2a4607f066..c16a757846afc2fb2149323de6b2c0017306e991 100755
--- a/tests/test_integration_workflow_multiple_lanes/test.slurm.sh
+++ b/tests/test_integration_workflow_multiple_lanes/test.slurm.sh
@@ -31,6 +31,7 @@ snakemake \
     --cluster-config="../input_files/cluster.json" \
     --cluster="sbatch --cpus-per-task={cluster.threads} --mem={cluster.mem} --qos={cluster.queue} --time={cluster.time} --job-name={cluster.name} -o {cluster.out} -p scicore" \
     --cores=256 \
+    --jobs=256 \
     --printshellcmds \
     --rerun-incomplete \
     --use-singularity \
diff --git a/tests/test_integration_workflow_with_conda/test.slurm.sh b/tests/test_integration_workflow_with_conda/test.slurm.sh
index 873f17bafcc6bdf9f7a9718793fea3d97ef8eed4..3fe2491dc7a34fabaebf094a7ab7abc4148d6aed 100755
--- a/tests/test_integration_workflow_with_conda/test.slurm.sh
+++ b/tests/test_integration_workflow_with_conda/test.slurm.sh
@@ -31,6 +31,7 @@ snakemake \
     --cluster-config="../input_files/cluster.json" \
     --cluster="sbatch --cpus-per-task={cluster.threads} --mem={cluster.mem} --qos={cluster.queue} --time={cluster.time} --job-name={cluster.name} -o {cluster.out} -p scicore" \
     --cores=256 \
+    --jobs=256 \
     --printshellcmds \
     --rerun-incomplete \
     --use-conda \