diff --git a/src/.docker_modules/r-bolero/1.0/Start_positions.R b/src/.docker_modules/r-bolero/1.0/Start_positions.R
index f31afaae99dbcfd8686576f070d979db06277800..830c52e07598df6019bacf72c72128f99688a3d9 100644
--- a/src/.docker_modules/r-bolero/1.0/Start_positions.R
+++ b/src/.docker_modules/r-bolero/1.0/Start_positions.R
@@ -69,7 +69,7 @@ ggplot(df_parsed, aes(Start_position, nb_reads)) +
   theme(axis.text.x = element_text(angle = 45)
   )
 
-ggsave(paste0(filename,".jpg"),
+ggsave(paste0(filename,".png"),
        plot = last_plot(),
        scale = 2,
        width = 1920,
@@ -201,7 +201,7 @@ plot_camembert <- function(barcode, df, tot) {
   
   print(camembert)
   
-  ggsave(filename = paste0("./Reads_start_promoters_", barcode, "_camembert.jpg"),
+  ggsave(filename = paste0("./Reads_start_promoters_", barcode, "_camembert.png"),
          plot = last_plot(),
          scale = 1,
          width = 1920,
diff --git a/src/nf_modules/junction_nanosplicer/main.nf b/src/nf_modules/junction_nanosplicer/main.nf
index 9000bc89d64e21522d056647e9867bca66a8ec15..9f0a209ea7f5d158f1d0e277ad30294ead8b4d69 100644
--- a/src/nf_modules/junction_nanosplicer/main.nf
+++ b/src/nf_modules/junction_nanosplicer/main.nf
@@ -17,7 +17,7 @@ process junctions_nanosplicer{
   output:
     path("Rplots.pdf")
     path("JWR_check_parsed.csv")
-    path("*.jpg")
+    path("*.png")
     path("identified_SPvariants.csv"), emit: identified_SPvariants
 
   script:
diff --git a/src/nf_modules/rna_count/main.nf b/src/nf_modules/rna_count/main.nf
index 4d9b6f40308b9267327d7e3d032757b59cb686f2..a2ae2ce641efe1f9829f2d6712720cb9dea743af 100644
--- a/src/nf_modules/rna_count/main.nf
+++ b/src/nf_modules/rna_count/main.nf
@@ -17,7 +17,7 @@ process rna_count{
   output:
     path("*.csv")
     path("*.pdf")
-    path("*.jpg")
+    path("*.png")
 
   script:
     """
diff --git a/src/nf_modules/start_positions/main.nf b/src/nf_modules/start_positions/main.nf
index 4b97e0c562d341772229efaed144f31e8ceb53f5..27b8ebf35ef66e41db2de2a114008883e26e04d6 100644
--- a/src/nf_modules/start_positions/main.nf
+++ b/src/nf_modules/start_positions/main.nf
@@ -14,7 +14,7 @@ process start_position_individuals{
 
   output:
     path("Rplots.pdf")
-    path("*.jpg")
+    path("*.png")
     path("Count_reads_per_promoter.tsv")
     path("classification_of_reads_per_RNA.txt"), emit: classification_of_reads