diff --git a/qhtcp-workflow/apps/r/calculate_interaction_zscores.R b/qhtcp-workflow/apps/r/calculate_interaction_zscores.R
index e911620d..2bf06e1b 100644
--- a/qhtcp-workflow/apps/r/calculate_interaction_zscores.R
+++ b/qhtcp-workflow/apps/r/calculate_interaction_zscores.R
@@ -6,16 +6,10 @@ suppressMessages({
   library("rlang")
   library("ggthemes")
   library("data.table")
-  library("unix")
 })
 
 options(warn = 2)
 
-# Set the memory limit to 30GB (30 * 1024 * 1024 * 1024 bytes)
-soft_limit <- 30 * 1024 * 1024 * 1024
-hard_limit <- 30 * 1024 * 1024 * 1024
-invisible(rlimit_as(soft_limit, hard_limit))
-
 # Constants for configuration
 plot_width <- 14
 plot_height <- 9