diff --git a/DESCRIPTION b/DESCRIPTION
index bce9bf7..6a7f091 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: raer
 Type: Package
 Title: RNA editing tools in R
-Version: 1.1.2
+Version: 1.1.3
 Authors@R: c(
     person("Kent", "Riemondy", , "kent.riemondy@gmail.com", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0003-0750-1273")),
diff --git a/R/sc-pileup.R b/R/sc-pileup.R
index 78036c5..91404c5 100644
--- a/R/sc-pileup.R
+++ b/R/sc-pileup.R
@@ -464,27 +464,28 @@ write_sparray <- function(sce, mtx_fn, sites_fn, bc_fn) {
     if (!conforms) {
         cli::cli_abort("nRef and nAlt sparseMatrices triplet dimensions differ")
     }
-
+    mtx_fn <- gzfile(mtx_fn, 'w')
     writeLines(
         c(
             "%%% raer MatrixMarket-like matrix coordinate integer general",
             paste("%%% ", nref@Dim[1], nref@Dim[2], length(nref@x)),
             "%%% x y nRef nAlt"
         ),
-        gzfile(mtx_fn)
+        mtx_fn
     )
 
     mtx <- matrix(0L, nrow = dim(nref_trpl)[1], ncol = 4L)
     mtx <- cbind(nref_trpl, nalt = nalt_trpl$x)
 
-    data.table::fwrite(mtx, mtx_fn,
-        append = TRUE,
+    write.table(mtx, 
+                mtx_fn,
         sep = " ",
         row.names = FALSE,
         col.names = FALSE,
-        showProgress = FALSE
+        quote = FALSE
     )
-
+    close(mtx_fn)
+    
     sites <- data.frame(
         seq_along(sce),
         seqnames(sce),
@@ -494,11 +495,11 @@ write_sparray <- function(sce, mtx_fn, sites_fn, bc_fn) {
         rowData(sce)$ALT
     )
 
-    data.table::fwrite(sites, sites_fn,
+    write.table(sites,
+        gzfile(sites_fn),
         sep = "\t",
         row.names = FALSE,
-        col.names = FALSE,
-        showProgress = FALSE
+        col.names = FALSE
     )
 
     writeLines(colnames(sce), gzfile(bc_fn))