diff --git a/01-MSA-hello-world/Makefile b/01-MSA-hello-world/Makefile
index 0636feebfffd9c365cfdc7f420cd09a30920a53f..bd8251c599d6258dba550eb68d1b84987d4a7f5a 100644
--- a/01-MSA-hello-world/Makefile
+++ b/01-MSA-hello-world/Makefile
@@ -1,10 +1,10 @@
-EXECS=mpi_hello_world.x
+EXECS=mpi_hello_world.out
 MPICC=mpicc
 
 all: ${EXECS}
 
-mpi_hello_world.x: mpi_hello_world.c
-	${MPICC} -o mpi_hello_world.x mpi_hello_world.c
+mpi_hello_world.out: mpi_hello_world.c
+	${MPICC} -o mpi_hello_world.out mpi_hello_world.c
 
 clean:
-	rm ${EXECS} *.x || true
+	rm ${EXECS} *.out || true
diff --git a/01-MSA-hello-world/compile_all.sh b/01-MSA-hello-world/compile_all.sh
index 5752aad689c0db5ec16759a09c5c35fcdae97ed3..5fb05fb35ade1afe317797234426a4e226c20714 100755
--- a/01-MSA-hello-world/compile_all.sh
+++ b/01-MSA-hello-world/compile_all.sh
@@ -1,7 +1,7 @@
 ml GCC ParaStationMPI
 make
-mv mpi_hello_world.x mpi_hello_world_cluster.x
+mv mpi_hello_world.out mpi_hello_world_cluster.out
 
 ml GCC ParaStationMPI
 make
-mv mpi_hello_world.x mpi_hello_world_booster.x
+mv mpi_hello_world.out mpi_hello_world_booster.out
diff --git a/01-MSA-hello-world/job_msa_jureca.sh b/01-MSA-hello-world/job_msa_jureca.sh
index aa38862c7bd6325aa41d168d376da70d829f4e5b..641e74b4ffc308bd040d6463e1e328c6add78134 100644
--- a/01-MSA-hello-world/job_msa_jureca.sh
+++ b/01-MSA-hello-world/job_msa_jureca.sh
@@ -5,10 +5,10 @@
 #SBATCH --output=slurm-out.%j
 #SBATCH --error=slurm-err.%j
 #SBATCH --time=00:15:00
-#SBATCH --partition=dc-cpu
+#SBATCH --partition=dc-cpu-devel
 #SBATCH hetjob
 #SBATCH --nodes=1
 #SBATCH --ntasks-per-node=1
-#SBATCH --partition=dc-gpu
+#SBATCH --partition=dc-gpu-devel
 
-srun xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world_cluster.x : xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world_booster.x
+srun xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world_cluster.out : xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world_booster.out
diff --git a/01-MSA-hello-world/job_msa_juwels.sh b/01-MSA-hello-world/job_msa_juwels.sh
index a509e4bc324bcd026de923fc7311a3a36d82c6fa..d362ad173e8209fd91c09dcdaad823582f41f080 100644
--- a/01-MSA-hello-world/job_msa_juwels.sh
+++ b/01-MSA-hello-world/job_msa_juwels.sh
@@ -11,4 +11,4 @@
 #SBATCH --ntasks-per-node=1
 #SBATCH --partition=develbooster
 
-srun xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world_cluster.x : xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world_booster.x
+srun xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world_cluster.out : xenv -P -L GCC -L ParaStationMPI ./mpi_hello_world_booster.out