diff --git a/increasing_size_test.R b/increasing_size_test.R
index afbba02..d42bb0c 100644
--- a/increasing_size_test.R
+++ b/increasing_size_test.R
@@ -14,7 +14,7 @@ if (length(args) <= 1) {
     max_arg <- args[2]
 }
 
-if (identical(max_arg, character(0)) || is.na(as.integer(max_arg))) {
+if (identical(max_arg, character(0)) || is.na(as.integer(max_arg)) || as.integer(max_arg) <= 0) {
     max_nb_col <- 5000L
     print(paste0("No or incorrect argument was passed setting max to default value : ", max_nb_col))
 } else {
@@ -22,7 +22,7 @@ if (identical(max_arg, character(0)) || is.na(as.integer(max_arg))) {
     print(paste0("Setting to max provided value : ", max_nb_col))
 }
 
-if (identical(min_arg, character(0)) || is.na(as.integer(min_arg))) {
+if (identical(min_arg, character(0)) || is.na(as.integer(min_arg)) || as.integer(min_arg) <= 0) {
     min_nb_col <- 50L
     print(paste0("No or incorrect argument was passed setting min to default value : ", min_nb_col))
 } else {