diff --git a/R/spark_read_bigquery.R b/R/spark_read_bigquery.R
index f3d7ad6..974b3a1 100644
--- a/R/spark_read_bigquery.R
+++ b/R/spark_read_bigquery.R
@@ -97,7 +97,7 @@ spark_read_bigquery <- function(sc,
                                 ...) {
   parameters <- c(list(), additionalParameters)
   if (!is.null(serviceAccountKeyFile)) {
-    parameters[["credentialsFile"]] = serviceAccountKeyFile
+    parameters[["credentialsFile"]] = normalizePath(serviceAccountKeyFile, winslash = "/")
   }
   
   if (!is.null(datasetId) && !is.null(tableId)) {
diff --git a/R/spark_write_bigquery.R b/R/spark_write_bigquery.R
index d808031..cc6f7c1 100644
--- a/R/spark_write_bigquery.R
+++ b/R/spark_write_bigquery.R
@@ -80,7 +80,7 @@ spark_write_bigquery <- function(data,
   additionalParameters)
   
   if (!is.null(serviceAccountKeyFile)) {
-    parameters[["credentialsFile"]] = serviceAccountKeyFile
+    parameters[["credentialsFile"]] = normalizePath(serviceAccountKeyFile, winslash = "/")
   }
   
   spark_write_source(data,