diff --git a/R/DataModel.R b/R/DataModel.R
index abe01f4..97c8625 100644
--- a/R/DataModel.R
+++ b/R/DataModel.R
@@ -49,7 +49,7 @@ checkAndFixColumnNames <-
     expectedNames <- tableSpecs %>%
       dplyr::select("columnName") %>%
       dplyr::anti_join(dplyr::filter(optionalNames, !.data$columnName %in% observeredNames),
-        by = "columnName"
+                       by = "columnName"
       ) %>%
       dplyr::arrange("columnName") %>%
       dplyr::pull()
@@ -181,7 +181,7 @@ checkAndFixDuplicateRows <-
            specifications) {
     primaryKeys <- specifications %>%
       dplyr::filter(.data$tableName == !!tableName &
-        tolower(.data$primaryKey) == "yes") %>%
+                      tolower(.data$primaryKey) == "yes") %>%
       dplyr::select("columnName") %>%
       dplyr::pull()
     duplicatedRows <- duplicated(table[, primaryKeys])
@@ -194,7 +194,7 @@ checkAndFixDuplicateRows <-
           sum(duplicatedRows)
         )
       )
-      return(table[!duplicatedRows, ])
+      return(table[!duplicatedRows,])
     } else {
       return(table)
     }
@@ -220,7 +220,7 @@ appendNewRows <-
     if (nrow(data) > 0) {
       primaryKeys <- specifications %>%
         dplyr::filter(.data$tableName == !!tableName &
-          tolower(.data$primaryKey) == "yes") %>%
+                        tolower(.data$primaryKey) == "yes") %>%
         dplyr::select("columnName") %>%
         dplyr::pull()
       newData <- newData %>%
@@ -250,10 +250,10 @@ formatDouble <- function(x) {
 
 .truncateTable <- function(tableName, connection, schema, tablePrefix) {
   DatabaseConnector::renderTranslateExecuteSql(connection,
-    "TRUNCATE TABLE @schema.@table_prefix@table;",
-    table_prefix = tablePrefix,
-    schema = schema,
-    table = tableName
+                                               "TRUNCATE TABLE @schema.@table_prefix@table;",
+                                               table_prefix = tablePrefix,
+                                               schema = schema,
+                                               table = tableName
   )
   invisible(NULL)
 }
@@ -354,8 +354,8 @@ uploadChunk <- function(chunk, pos, env, specifications, resultsFolder, connecti
     primaryKeyValuesInChunk <- unique(chunk[env$primaryKey])
     duplicates <-
       dplyr::inner_join(env$primaryKeyValuesInDb,
-        primaryKeyValuesInChunk,
-        by = env$primaryKey
+                        primaryKeyValuesInChunk,
+                        by = env$primaryKey
       )
 
     if (nrow(duplicates) != 0) {
@@ -386,7 +386,7 @@ uploadChunk <- function(chunk, pos, env, specifications, resultsFolder, connecti
       # Remove duplicates we already dealt with:
       env$primaryKeyValuesInDb <-
         env$primaryKeyValuesInDb %>%
-        dplyr::anti_join(duplicates, by = env$primaryKey)
+          dplyr::anti_join(duplicates, by = env$primaryKey)
     }
   }
   if (nrow(chunk) == 0) {
@@ -428,7 +428,7 @@ uploadTable <- function(tableName,
 
     primaryKey <- specifications %>%
       dplyr::filter(.data$tableName == !!tableName &
-        tolower(.data$primaryKey) == "yes") %>%
+                      tolower(.data$primaryKey) == "yes") %>%
       dplyr::select("columnName") %>%
       dplyr::pull()
 
@@ -444,7 +444,7 @@ uploadTable <- function(tableName,
     if (purgeSiteDataBeforeUploading && "database_id" %in% primaryKey) {
       type <- specifications %>%
         dplyr::filter(.data$tableName == !!tableName &
-          .data$columnName == "database_id") %>%
+                        .data$columnName == "database_id") %>%
         dplyr::select("dataType") %>%
         dplyr::pull()
       # Remove the existing data for the databaseId
@@ -572,10 +572,10 @@ uploadResults <- function(connection = NULL,
     ParallelLogger::logInfo("Removing all records for tables within specification")
 
     invisible(lapply(unique(specifications$tableName),
-      .truncateTable,
-      connection = connection,
-      schema = schema,
-      tablePrefix = tablePrefix
+                     .truncateTable,
+                     connection = connection,
+                     schema = schema,
+                     tablePrefix = tablePrefix
     ))
   }
 
@@ -639,6 +639,7 @@ uploadResults <- function(connection = NULL,
 #' @export
 deleteAllRowsForPrimaryKey <-
   function(connection, schema, tableName, keyValues) {
+
     createSqlStatement <- function(i) {
       sql <- paste0(
         "DELETE FROM ",
@@ -647,7 +648,7 @@ deleteAllRowsForPrimaryKey <-
         tableName,
         "\nWHERE ",
         paste(paste0(
-          colnames(keyValues), " = '", keyValues[i, ], "'"
+          colnames(keyValues), " = '", keyValues[i,], "'"
         ), collapse = " AND "),
         ";"
       )
@@ -722,9 +723,9 @@ deleteAllRowsForDatabaseId <-
         database_id = databaseId
       )
       DatabaseConnector::executeSql(connection,
-        sql,
-        progressBar = FALSE,
-        reportOverallTime = FALSE
+                                    sql,
+                                    progressBar = FALSE,
+                                    reportOverallTime = FALSE
       )
     }
   }
@@ -810,22 +811,32 @@ loadResultsDataModelSpecifications <- function(filePath) {
 #' recast to a character data type and not try to handle different type
 #' conversions.
 formatChunk <- function(pkValuesInDb, chunk) {
-  if (nrow(pkValuesInDb) > 0) {
-    for (columnName in names(pkValuesInDb)) {
-      if (class(pkValuesInDb[[columnName]]) != class(chunk[[columnName]])) {
-        if (class(pkValuesInDb[[columnName]]) == "character") {
-          chunk <- chunk |> dplyr::mutate_at(columnName, as.character)
-        } else {
-          errorMsg <- paste0(
-            columnName,
-            " is of type ",
-            class(pkValuesInDb[[columnName]]),
-            " which cannot be converted between data frames pkValuesInDb and chunk"
-          )
-          stop(errorMsg)
-        }
+
+  for (columnName in names(pkValuesInDb)) {
+    if (class(pkValuesInDb[[columnName]]) == "integer") {
+      pkValuesInDb[[columnName]] <- as.numeric(pkValuesInDb[[columnName]])
+    }
+
+    if (class(chunk[[columnName]]) == "integer") {
+      chunk[[columnName]] <- as.numeric(chunk[[columnName]])
+    }
+
+
+    if (class(pkValuesInDb[[columnName]]) != class(chunk[[columnName]])) {
+      if (class(pkValuesInDb[[columnName]]) == "character") {
+        chunk <- chunk |> dplyr::mutate_at(columnName, as.character)
+
+      } else {
+        errorMsg <- paste0(
+          columnName,
+          " is of type ",
+          class(pkValuesInDb[[columnName]]),
+          " which cannot be converted between data frames pkValuesInDb and chunk"
+        )
+        stop(errorMsg)
       }
     }
   }
+
   return(chunk)
 }
diff --git a/tests/testthat/test-DataModelFunctions.R b/tests/testthat/test-DataModelFunctions.R
index dc69771..e7c3dc1 100644
--- a/tests/testthat/test-DataModelFunctions.R
+++ b/tests/testthat/test-DataModelFunctions.R
@@ -79,3 +79,12 @@ test_that("formatChunk throws error for incompatible types", {
     "id is of type numeric which cannot be converted between data frames pkValuesInDb and chunk"
   )
 })
+
+test_that("format chunk handles int/numeric type conversions ok", {
+  class(pkValuesInDb$id) <- "numeric"
+  class(chunk$id) <- "integer"
+  chunk <- formatChunk(pkValuesInDb, chunk)
+  checkmate::expect_data_frame(chunk)
+  checkmate::expect_numeric(chunk$id)
+})
+